PHYSICS HOLIDAY HOMEWORK (2015-2016) CLASS-X

1. Why is nichrome used as a heating element?

2. Find the ratio of equivalent resistance of series combination of n equal resistances to the equivalent

resistance in parallel combination of these n resistances.

3. Calculate the number of electrons constituting 4C of charge.

4. (a). Define one ampere.

(b). the filament of an electric lamp draws a current of 0.4A which lights for 3 hours. Calculate

the amount of charge that flows through the circuit.

5. Calculate the amount of work done to carry 4Cof charge across two points having a potential

difference 24V.

6. (a). State ohm’s law.

(b). Express ohm’s law both by a mathematical formula and by a graph line.

(c ). Write the S.I unit of resistance.

7. How much current does an electric heater draw from a 220V line, if the resistance of the heater

(when hot) is 50 ohm?

8. A 8 ohm wire is doubled on it. Calculate the new resistance of the wire.

9. Two resistors 4 ohm and 6 ohm are connected in parallel. The combination is connected across 6V

battery of negligible resistance. Calculate (a) the current through the battery. (b) current through

each resistor.

10. What do you mean by electric potential difference? How is it measured? Define its SI unit.

CHEMISTRY HOLIDAY HOME WORK (2015-2016) CLASS-X

Q 1 Name and define all the types of chemical reactions and give 2 examples of each .

Q 2 Whenever a reaction takes place visible change is also seen .List all changes support every change with appropriate example . Q 3 Balance the equations

i) Na₂Co₃ + HCl → NaCl + H₂O +Co₂

ii) FeCl₂ + H₂S → HCl + FeS

iii) NaCl + H₂SO₄ → Na₂SO₄ + HCl

iv) CS₂ + O₂ → Co₂ + So₂

v) K + H₂O → KOH + H₂

vi) H₂S + O₂ → H₂O + S

vii) N₂ + H₂ → NH₃

Q 4 Draw a neat diagram of the electrolytic decomposition. Also write down the chemical reaction involved

Q 5 List various chemical reaction taking place around us. Classify each one with appropriate type.

BIOLOGY HOLIDAY HOME WORK (2015-2016) CLASS-X

1 To study the effects of different fertilizers on the rate of germination elongation of

hypocotyls and on the length of root of some plants.

2. Make a chart based on the topics you have covered in Biology-Life processes.

3. Do all the question-answers of your NCERT Book.

ENGLISH HOLIDAY HOME WORK (2015-2016) CLASS-X

S. SC. HOLIDAY HOME WORK (2015-2016) CLASS-X

1. Read any newspaper for one week and make clippings of news related to ongoing conflicts or war. A group of 5

students could pool these clippings together and do the following.

(a) Classify these conflicts on location (Inside India or outside India)

(b) Find out the cause for each of these conflicts. How many of these conflicts are related to power sharing disputes.

(c) Which of these conflicts could be resolved by working out power sharing arrangements.

2. What are the different forms of powers sharing in democracy? Give example on each of these.

3. Compare and contrast power sharing in Belgium and Sri Lanka.

4. Make a chart on classification of resources.

5. On an outline map of India mark major soil types.

6. Make a chart in tabular form different soils including their colour, state where they are found, crops grown in a

particular soil, their physical and chemical properties.

7. Enumerate the steps taken to control soil erosion.

8. Explain land use pattern in India and why has forest land not increased much since 1960-61

9. Make a project on how industrialization has changed the life of man.

10. Explain figure1 , The Dawn of the century published in England in 1900.

11. How did industrialization affect the life o factory workers?

12. Explain the coming up of factories in England in the early 1730s.

13. Explain human development report published by UNDP.

14. Mention the criteria which is used to measure the development of a country with special reference to HDI.

15. Write the formula of BMI.