qssc_12fbi_pr_s11.indd · web viewa physics student performs a double-slit diffraction experiment...

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QSSC ﻗﻗﻗ ﻗﻗ ﻗﻗ ﻗﻗ ﻗﻗﻗ اء ي ز ي ف ل ي س سي أ ت ل ا وي ت س م ل – اFoundation physics Practice Test ﻗﻗ ﻗﻗﻗ ﻗﻗ ﻗﻗﻗ2013 Directions - This test has 30 items. Some of the items are multiple- choice items. You will select the correct answer. Some items require you to write a short response. - You may use these practice items to prepare for the Secondary School Certificate Test in physics. - The items have been presented in Arabic and English to help you better understand them. - You may answer the short response questions in Arabic or in English.

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Page 1: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

QSSC الاثنوية الاعمة لدلوة رطق الاهشدة

التأسيسي – لفيزياء المستوي ا

Foundation physicsPractice Test خالابتار الرجتييب

2013

Directions- This test has 30 items. Some of the

items are multiple-choice items. You will select the correct answer. Some items require you to write a short response.

- You may use these practice items to prepare for the Secondary School Certificate Test in physics.

- The items have been presented in Arabic and English to help you better understand them.

- You may answer the short response questions in Arabic or in English.

تاهيجوتلا

اذه رابتخالا 30. ضعب ةلئسألا يه ددع ةلئسأ - نم تاباجإ ،ةددعتم موقت اهيف

بلطتتو ضعبةلئسأ رايتخا رايتخاب ةباجإلا ةحيحصلا.

. ةباتك ةباجإ ةريصق ةلئسألاةلئسألا ةيبيرجتلا ةيالتلا

ميكنك مادختسا -ةداهش ةيوناثلا ةماعلا

دادعتسالل رابتخال. يف ةدام الفيزياء

ا ملةيسردإلاو ةغلالب ةيبرعلا جنةيزيل

مت ريفوت هذه ةلئسألا -. اهمهف ةروصب لضفأ

ملكتدعاس ىلع

Page 2: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

ىلعةلئسألا يتلا بلطتت ميكنك ةباجإلا -

. إلا ةيبرعلا وأ جنةيزيل تاباجإ ةريصق ةغلالب

Page 3: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

An aluminum nucleus contains 27 nucleons and 14 neutrons. What is the atomic number?

41

27

13

7

The diagram below shows a force of magnitude F = 30 N applied to a mass at angle θ=25o relative to a horizontal frictionless surface for distance S = 5 m.

What is the work done by the force?

150 J

136 J

75 J

27 J

2

1

Page 4: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

نيوترون . 14 نيوكليون و 27 نواة األلمنيوم تحتوي ما العدد الذري لها ؟

41

27

13

7

مقدارها قوة يبين التالي بزاوية نيوتن 30الشكل 25o تؤثراملس افقى سطح على موضوعة كتلة على االفقي عن

مقدارها متر . 5مسافة

القوة؟ قبل من المبذول الشغل مقدار ما

150 J

136 J

75 J

27 J

4

1

2

Page 5: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

The diagram below shows a moving, 5.00 kg cart at the foot of a hill 10.0 m high.

For the cart to reach the top of the hill.what is the minimum kinetic energy of the cart in the position shown? [Neglect energy loss due to friction.] use g =9.8 m/s2

500 J

490 J

250. J

175 J

3

Page 6: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

10.0 m 5.00تتحرك باتجاه تلة ارتفاعها kg الشكل التالي يمثل عربة

ما أقل طاقة حركة للعربة في الموضع الذي توجد فيه بالشكل لكي تصل العربة الى قمة التلة

الطاقة الضائعة من قبل االحتكاك تهمل( . ) ))g =9.8 m/s2)

500 J

490 J

250 J

175 J

6

3

Page 7: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

The diagram shows an a.c. generator. ''With'' the coil in the position shown.

What happens to the magnitude of the electromotive force if the coil is rotated 180o?

Remain the same Doubled

Cut to half Becomes zero

A radioactive sample has a half-life of 7 minutes. What fraction is left after 28 minutes?

12

14

18

116

4

5

Page 8: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

الشكل يمثل مولد تيار متردد في الوضع الذي يوجد فيه الملف.

؟180oماذا يحدث لمقدار القوة المحركة الكهربائية اذا دار الملف

ثابتة تبقى

تتضاعف النصف الى تقلصفرا تصبح

دقائق.7عينة من عنصر مشع عمر النصف لها دقيقة؟28 ما نسبة ما تبقى من العينة بعد

1

2

14

18

8

4

5

Page 9: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

116

The diagram below represents the wave pattern produced by two sources located at points A and B.

Which phenomenon occurs at the intersections of the circular wave fronts? Reflection

Refraction

Diffraction

Interference

A rectangular coil, with A=0.06 m2, rotates in a uniform magnetic field of

Flux density B= 0.06 T. The coil has 200 turns and its rotational frequency is 50 HzWhat is the maximum electromotive force emf induced in the coil?

301 V

276 V

6

7

Page 10: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

226 V

136 V

الشكل التالي يوضح االهداب الموجية التي تنتج من مصدرين .B و Aموضوعين عند النقاط

ما اسم الظاهرة التي تحدث عند نقاط التقاطع لجبهات الموجة؟

االنعكاس

االنكسار

الحيود

التداخل

, يدور في مجال مغناطيسيA=0.06 m2ملف مستطيل مساحته . فإذا كانB= 0.06 Tشدته

.HZ 50 لفة وتردده 200 عدد لفات الملف ؟ ما مقدار القوة المحركة الكهربائية العظمى في الملف

301 V

276 V

226 V10

6

7

Page 11: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

136 V

A crane has efficiency of 75%. What does this mean?

The useful energy is 25%.

The useful energy is 75%.

The waste energy is 75%.

The waste energy is 100%

Which of the following can be deduced from ''the'' Rutherford scattering experiment?

Alpha particles are helium nuclei Most of the space in ''the'' atom is occupied by the nucleus

''The'' nucleus has the greatest mass

Electrons have the greatest mass

8

9

Page 12: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

.%75 رافعة كفاءتها

ماذا يعني ذلك؟

هي المستفادة %25الطاقة

هي المستفادة %75الطاقة

هي الضائعة %75الطاقة

هي الضائعة %100الطاقة

أي مما يلي يمكن استنتاجه من تجربة رذرفورد؟

الهيليوم انوية هي الفا جسيمات

النواة تشغله الفراغ معظم

كتلة اكبر لها النواة

كتلة اكبر لها االلكترونات

12

8

9

Page 13: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

A straight wire, 0.02 m long, moves at a constant speed of 7.0 m/sperpendicular to a magnetic field of strength 0.002 T.

What EMF is induced in the wire?

2.8 x 10-4 V

4.0 x 10-4 V

7.022 V

7. 0 V

The instantaneous voltage output of a generator is given by V ins=12 sinθ. If the resistance of the circuit R = 5 Ω. ''What'' is the RMS( root mean square) current in the circuit?

7.0 A

2.4 A

10

11

Page 14: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

1.8 A

1.7 A

يتحرك عموديا على مجال m 0.02سللك مستقيم طوله 7.0 بسرعة ثابته مقدارها T 0.002مغناطيسي شدته

m/s

الدائرة؟ في المتولدة الكهربائية المحركة القوة مقدار ما

2.8 x 10-4 V

4.0 x 10-4 V

7.022 V

7.0 V

Vالجهد اللحظي الناتج من المولد تعطى بالعالقة ins=12 sinθفاذا كانت . مقاومة الدائرة

R = 5 Ω,ما مقدار شدة التيار الفعالة في الدائرة؟

14

10

11

Page 15: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

7.0 A2.4 A

1.8 A

1.7 A

The figure shows the path of a ray of light as it passes through three different materials with refractive indices n1, n2 and n3. The figure is drawn to scale.

What can we conclude concerning the indices of these three materials? n3<n2<n1

n3<n1<n2

n1<n3<n2

n2<n1<n3

What is the product when ''a'' polonium nucleus Po84210 undergoes

alpha and gamma decay ?

Pb82

206

12

13

Page 16: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

Pb82

208

Pb85210

Pb80210

في مختلفة مواد ثالثة خالل ضوئي شعاع مسار يمثل الشكلانكسارها بمقياس . n3و n2و n1معامالت الشكل رسم

صحيح .

؟ الثالث المعامالت هذه بين للعالقة الصحيح االستنتاج ما

n3<n2<n1

n3<n1<n2

n1<n3<n2

n2<n1<n3

البولونيوم نواة من ينتج Po84ماذا؟ 210 وجاما الفا النحالل تخضع عندما

Pb82

206 16

12

13

Page 17: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

Pb82

208

Pb85210

Pb80210

The graph below shows the relationship between the work done by a student and the time of ascent as the student runs up a flight of stairs.

What is the unit for the slope of the graph?

Joule

Second

Watt

Newton

''At a given point, the power exerted by a10N force on a particle is 55 watt.

14

15

Page 18: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

What is the velocity of the particle at that point?

0.18 m/s

5.5 m/s

45 m/s

55 m/s

الرسم البياني يبين العالقة بين الشغل المبذول من قبل طالب وزمن صعوده ساللم المبنى.

ما هي وحدة قياس ميل المستقيم الناتج ؟

الجول

الثانية

الواط

نيوتن

, قبل من جسيم على المبذولة القدرة كانت اذا معينة نقطة في18

15

14

Page 19: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

مقدارها ,55هي 10Nقوة واط

النقطة؟ تلك عند الجسيم سرعة هي ما

0.18 m/s

5.5 m/s

45 m/s

55 m/s

You drop a 6.0 x10-2 kg ball from a height of 1.0 m above a hard, flat surface. The ball strikes the surface and loses 0.14 J of its energy. It then bounces back upward. How much kinetic energy does the ball have just after it bounces off the flat surface? ( g= 9.8 m/s2)

0.20 J

0.45 J

0.59 J

0.73 J

The efficiency of a machine is 70%. ''The'' useful energy produced is equal to 600J. The lost energy from the machine is:

16

17

Page 20: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

257.1 J

300 J

220.2 J

1400 J

كتلتها كرة ارتفاع x10-2 kg 6.0اسقطت سطح m 1.0من على . فقدت بالسطح الكرة اصطدام وعند صلب J 0.14افقي

. , ألعلى ارتدت ثم طاقتها منالسطح من ارتدادها لحظة للكرة الحركة طاقة مقدار ما

)g= 9.8 m/s2( الصلب؟

0.20 J

0.45 J

0.59 J

0.73 J

% , وكانت الطاقة المفيدة الناتجة70اذا كانت كفاءة الة 600Jتساوي

فان الطاقة المفقودة من االلة تكون:

20

17

16

Page 21: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

257.1 J

300 J

220.2 J

1400 J

The figure below shows the cathode ray tube:

What is the function of part 3 is:?

Doesn’t have a function

Diffracts the rays to point C

Diffracts the rays to point B

Diffracts the rays to point A

A rubber ball dropped from a height of 8.0 m ''onto'' a hard 19

18

Page 22: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

concretefloor. It hits the floor and bounces repeatedly.Each time it hits the floor, it loses 1

5 of its total energy. How many times will it bounce before it bounces back up to aheight of only about 4.1 m?

1time

2 times

3 times

4 times

الشكل التالي يمثل انبوب اشعة المهبط :

؟3 ما هي الوظيفة التي يقوم بها الجزء

االنبوب داخل وظيفة له ليسباتجاه االلكتروني الشعاع Cيحرفباتجاه االلكتروني الشعاع Bيحرف

باتجاه االلكتروني الشعاع Aيحرف

متر على سطح اسمنتي8سقطت كرة من المطاط من ارتفاع

صلب. وعند اصطدامها بالسطح ارتدت عدة مرات .فاذا

22

18

19

Page 23: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

1كانت الكرة تفقد طاقتها الكلية في كل مرة تصطدم5

,بالسطح متر؟ 4.1 كم مرة سترتد الكرة قبل ان ترتد ألعلى الى ارتفاع

واحدة مرة

مرتين

مرات ثالثة

مرات اربعة

'' the common…'' isotopes of the common elements up to iron have a mass number that is divisible by :

3

4

5

7

How is electromotive force (EMF) induced in the coil of wire rotating in a magnetic field affected if the rate of rotation is doubled?

20

21

Page 24: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

EMF is increased by a factor of 2

EMF is decreased by a factor of 2

EMF is decreased by a factor of 4

EMF is increased by a factor of 4

في النظائر الشائعة للعناصر المشتركة حتى الحديد يكون عدد :الكتلة لهم قابل للقسمة على

3

4

5

7

القو تتأثر سلكي ة كيف ملف في المستحثة الكهربية الدافعةالدوران؟ معدل مضاعفة الة في مغناطيسي مجال في يدور

24

20

21

Page 25: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

العدد عوامل أحد الكهربية الدافعة القوة 2تزيد

العدد عوامل أحد الكهربية الدافعة القوة 2تقل

العدد عوامل أحد الكهربية الدافعة القوة 4تقل

العدد عوامل أحد الكهربية الدافعة القوة 4تزيد

What is the approximate RMS ( root mean square) of an alternating current with a maximum voltage of 120 V?

170 V

120 V

100 V

85 V

22

Page 26: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

ما القيمة التقريبية لمتوسط الجذر التربيعي للجهد الكهربي لتيار ؟V 120متردد تبلغ القيمة العظمى لجهده

170 V

120 V

100 V

85 V

23 A transformer has 124 turns on the primary coil and 18600 turns on the secondary coil.

a) Is this a step-down or a step-up transformer?

Answer : ------------------------------------------------------------------

-------------------------------------------------------------------------------

b) If the effective voltage in the secondary coil is 3200 V, what is the peak voltage being delivered to the primary coil?

26

22

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Answer : ------------------------------------------------------------------

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------

23

لفة وملفه الثانوي124 محول كهربي يحتوي ملفه االبتدائي لفة.18600

)a هل هذا المحول رافع ام خافض للجهد؟

اإلجابة :------------------------------------------------------------------------

--------

------------------------------------------------------------------ ---------------

فولت. 3200 اذا كان الجهد الفعال في الملف الثانوي

Page 28: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

bفما القيمة العظمى للجهد في الملف االبتدائي؟ )

اإلجابة:--------------------------------------------------------------------------------

---------------------------------------------------------------------------------

24

A medical lab has a 16-gram sample of a radioactive isotope. After 6.0 hours, it is found that 12 grams of the sample have decayed.

a) What is the half-life of the isotope?

Answer : ------------------------------------------------------------------

------------------------------------------------------------------------------- 28

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-------------------------------------------------------------------------------

-------------------------------------------------------------------------------

a) What happens to the half-life of the sample if it was put

in a freezer?

Answer : ------------------------------------------------------------------

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------

24

ساعات6 جرام من عينة مشعة. بعد مرور 16 مختبر طبي لديه جرام من العينة قد تحلل.12وجد ان

) a المشعة؟ العينة لهذه النصف عمر ما

اإلجابة :------------------------------------------------------------------------

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--------

------------------------------------------------------------------- --------------

)bماذا يحدث لعمر النصف اذا وضعت العينة في مجمدة الثالجة؟

اإلجابة

:--------------------------------------------------------------------------------

------------------------------------------------------------------- --------------

25

A generator delivers an effective current of 75.2 A to a wire that has a resistance of 0.86 Ω.

a) What is the effective voltage?

30

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Answer : ------------------------------------------------------------------

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------

b) What is the peak voltage of the generator?

Answer : ------------------------------------------------------------------

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------

25

امبير عبر75.2مولد كهربي ينتج شدة تيار فعالة مقدارها Ω 0.86سلك مقاومته

aما مقدار الجهد الفعال؟ (

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اإلجابة :--------------------------------------------------------------------

----------

-------------------------------------------------------------- -----------------

b (ما القيمة العظمى للجهد التي ينتجها المولد؟

اإلجابة

:------------------------------------------------------------------------------

-------------------------------------------------------------- -----------------

32

Page 33: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

26 The following figure represents a cart starting from rest at position A.

a) What is the type of energy at positions A, B and C?. Answer : ------------------------------------------------------------------

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------

b) At what position does the cart have''the'' greatest velocity?

Answer : ------------------------------------------------------------------

-------------------------------------------------------------------------------

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26

الشكل التالي يمثل حركة عربة بدأت الحركة من السكون Aعند الموضع

) a ما نوع الطاقة للعربة عند المواضع A و B و C؟

اإلجابة :----------------------------------------------------------------------

----------

---------------------------------------------------------------- -----------------

)bعند اي موضع تكون سرعة العربة اكبر ما يمكن؟

اإلجابة :------------------------------------------------------------------------------

---------------------------------------------------------------------------------

34

Page 35: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

27

A physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser has a wavelength of 632.8 nm. The laser light passes through two slits separated by 0.020 mm.

What is the distance between the centers of the central band and the first-order band?

Answer : ------------------------------------------------------------------

-------------------------------------------------------------------------------

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Page 36: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

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انجز طالب فيزياء تجربة الحيود ذات الشقين على فإذا كان مسطرة ضوئية كما في الشكل التالي .

ومر الشعاع عبرnm 632.8طول موجة الليزر نيون-هيليوم mm 0.020الشقين بينهما مسافة

المضيئة الهدبة مركز و المركزية الهدبة مركز بين المسافة فمااألولى؟

اإلجابة :--------------------------------------------------------------------------------

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Page 37: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

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Page 38: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

A force of 95 N act on a crate with a mass of 210 kg. the force make a 37o angle with the horizontal. the crate moves 5.5 m . as shown in the figure below.

What is the work done by the force?

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Page 39: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

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210 نيوتن على صندوق شحن كتلته 95تؤثر قوة مقدارها مع37oكيلوجرام بحيث كانت القوة تصنع زاوية مقدارها

متر كما هو موضح5.5فتحرك الصندوق مسافة االفقي . في الشكل التالي :

ما مقدار الشغل الذي بذلته القوة؟

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Page 40: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

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A ray of light passes from air with θi=56o into a block of transparent material X with a refracted angle of θr=30o as shown in the diagram below.

a) Calculate the absolute index of refraction of material X.

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b) The refracted light ray is reflected from the material X–air boundary at point P. ''On'' the diagram, draw the reflected ray from point P.

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Page 41: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

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على قالب θi=56o سقط شعاع ضوئي من الهواء بزاوية كما هو مبينθr=30o وكانت زاوية االنكسار Xشفاف لمادة بالشكل ادناه.

) a احسب معامل االنكسار المطلق للمادة X.

اإلجابة :------------------------------------------------------------------------

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) b الشعاع المنكسر انعكس عند السطح الفاصل بين المادة X Pوالهواء عند النقطة

P ارسم على الشكل الشعاع المنعكس عند النقطة

اإلجابة:------------------------------------------------------------------------

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Page 42: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

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Page 43: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

a) What happens to the mass number and the atomic number when a nucleus emits an ''Alpha'' ( α ) particle?

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b) Beta particles are electrons emitted by the nucleus. The nucleus contains no electrons, so where do these electrons come from?

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Page 44: QSSC_12FBI_PR_s11.indd · Web viewA physics student performs a double-slit diffraction experiment on an optical bench, as shown in the figure below. The light from a helium-neon laser

aماذا يحدث للعدد الكتلي و للعدد الذري عندما تبعث النواة ) جسيم ألفا؟

اإلجابة

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bجسيمات بيتا هي الكترونات تنبعث من النواة. و االنوية ال ) تحتوي الكترونات . فما مصدر هذه االلكترونات؟

اإلجابة

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