8/18/2019 cxc1995p1

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Theunits

of

density

mayNOT be expressed

as

(A) ks/m'

(B)

kg

m-'

(C)

kg/p-r

(D)

ke/(m)3

Which

of ttre

ollowing

s

a dimensionlcss

quantity?

(A)

Density

(B)

Mass

(C)

Relative

ensity

(D)

Volume

The ime akenfora

endulum

ooscillate

0

times

s 15.5

s.

Which of the

following

indicateshe

requency,f, nd he

pcriod,

,

rcspectively?

f

(A)

0.65

Hz

(B) 0.65Hz

(C)

1.55Hz

(D)

1.55llz

T

1.55

155

0.65

15.5

The

density

f leact

s I I

000

kg m-3

nd hat

of

sreel

s

8 000kgm{.

whichof

he

ollow-

ing

statementsre

correct?

I. I I m3

of steel

has

hesame

mass s

8

m3

f

lead.

IL 8m3 of steelhas he samemassas

I I m3

of

lead.

III. I

I kg

of steel

as hesame olume

s

8

kg

oflead.

IV.

8

kg

of stecl

has

he

same

olumc

as

I I kg

oflead.

(A)

I

and

II

only

(B)

II

and

II

only

(C)

I and

V

only

(D)

II

and

V

only

,,.6.

.

.

7.

8.

.

t ? ? s

5 . 0.0000462 expresed

n

standard

orm s

(A)

(B)

(c)

(D)

4.62

x 10-5

4.62x 10-rN

462

x 10-4

4.62 ld N

Which

of

the

ollowing

arcbaseunitsof the

Intemational ystem f

Units?

I. Gram

II. Kelvin

III. Ampere

IV. Volt

(A) I and I only

(B)

II and ll

otrly

(C)

I,II

and

II

only

(D)

II,III

and

V

only

Which

of the

ollowing s

a

vector

physical

quantity?

(A)

Spced

(B)

Encrgy

(C) Mass

(D)

Displacemcnt

A hydroclectric

ower

station ses

renew-

able ource f energy,

.

This

energy

aises

water

o the op

of a

mountain

o hat

t has

gravitationalotential

nergy.

As

the

water

runsdown he

mountain,t tums a turbine

which

onverts energy

ntoZ

encrgy.

Which

set

of amwers

or X, Y

wtd-Z

s

conect?

(A)

(B )

(c)

(D)

Jt

Y

.Z-

Electrical

potential

kinetic

Solar

kinctic

electrical

Geothermal

potcntial

electrical

Chcmical

kinetic electrical

8/18/2019 cxc1995p1

2/10

z

12.

9.

A solid

object,

X,

floats

n mercury

and

sinks

in

water.

A solid

object,

Y'

floats

n both

mercury

and

water.

Which

of

the

ollowing

s rueaboutX andY?

(A)

X

is

less

dense

han

Y.

(B) X and

Y

are

both

denser

han

water'

(C) XandYarebothdenserthanmercury'

(D) X

is more

dense

han

Y.

Velocity

Which

of

the

following

motions

ould

he

graph

above

epresent?

(A)

A ball,

given

an

nitial

velocity,

ises

verticallY

and

then

falls

to

the

ground.

(B)

A

car,

moving

fnom

rest

with uni-

form

acceleration,

ttains

maxi-

mum

velocitY

nd

s decelerated

t

thesame

niform

ate.

(C) A car,

ravelling

with uniform

vclo-

city,

sdecelerated

ntil

t comes

o

resL

(D)

A

train

accelerates

rom

rest

at one

station,

ravels

or

a time

at

con-

stant

speed,

hen

comes

o

rest

at

thenextstadon'

Which

of

the

following

equatiolls

ould

be

used

o

calculate

Pressure?

Pressure

Pressure

Pressure

Pressure

Area

Mass

ffi-e

Height

x

DensitY

A car

s

moving

on

a circular

rack

with con-

stant

peed.

Which

of

tlre

ollowing

statements

about

he

carwould

bc

rue?

I. It is experiencing orce owardshe

centre

f

the circle.

II.

It is

moving

with

uniform

velocity'

ilI.

lt

hasan

acceleration.

(A)

I onlY

(B)

I and

II

ottlY

(C) lI

and

II onlY

(D) I,II and

II

An object s removedrom the groundand

placedon

a shelf.

Which

of

its

pnoperties

would

you

expect

o change?

(A)

Mass

(B)

Volume

(C)

Potential

nergy

(D)

Kinctic

energy

To

make

a

simple

mercury

barometer,

he

length

of

tube

used,

n cm'

should

be

about

(A)

s

(B)

80

(c)

136

(D)

760

The

inetic

nergy

f

a

body

f

mass,

,

and

vclocity,

, s

(A)

(B)

10.

13 .

14.

15.

m

v

mv

ut

2

mvL

(c)

(D)

(A)

(B)

(c)

1 1 .

D

8/18/2019 cxc1995p1

3/10

3

16.

Whichof

the

ollowing

gives

heefficiency

f a

machine?

Loadx

Distance

moved

y

Effort

x lOO7o

1

x 1004o

Effort

x

Distance

moved

by

Effort

I

Effort

x Distance

moved

by

Effort

x l0O

Vo

Load

x Distance

ovcdby

Load

I

Effort

x Disl.ance

oved

by

Load

x 100Vo

Load

x Distance

moved y

Effort

I

(A)

(B)

(c)

(D)

Effort

x Disttnce

moved

y

Load

Load

x Distance

moved y

Load

20.

7 . A falling raindrop eaches constant pced

whcn

(c)

there

s

no net

orceacting

n t

the

pull

of the

earth

n the

aindrop

s

equal

o

the

weightof

the

aindrop

the upthrust

due to

the

air

is

at

a

minimum

(D)

the air

surrounding

he

raindrop

c-

comcs

aturated

ith water apour

A

gas

s heated t constant

olumcso

hat

ts

pressure

ncreases.

hichof the

ollowing

s

NOT a

reason

or

the

pressure

ncrcase?

(A)

Molecules

move

aster.

(B)

Molecules

it hewallsof

tre ontaincr

harder.

(C)

Moleculcs

ave

more

rcqucnt olli-

sions

with

the

walls.

(D)

Molccules

avemore

rcqucnt olli-

sions

with

each

ther.

Rumford's

AlNcontribution

o

physics as

the

provision

f

evidence

or

thc

(A)

kinetic heory f

heat

(B)

caloric

heory f

heat

(C)

molecularheory

f

gases

(D)

conscrvation

f

matter

Whichof the ollowingstatementsbouthe

evaporation

f a

iquid s

NOT corect?

(A)

Molecules

ith highkinetic

ncrgy

escape

rom he

iquidsurface

hcn

evaporation

akes

lace.

(B)

Evaporat ion

s

possible

at al l

tempcratures.

(C)

The nct

rate

of evaporation

ncreascs

in

windy

sunoundings.

(D)

Evaporation

ccurs

hcnbubblcs f

vapour tart

orming

n

the

iquid

Boyle's

aw,

Charles'Law

nd

he

Pressurc

Law

canbe

combined

ndstated

s

(A)

PW

=

Constant

PV

(B)

r

=

Constant

PT

(c)

,

=

conslant

VT

(D)

f

=

constant

(A)

(B)

1 8 .

21.

19 .

8/18/2019 cxc1995p1

4/10

4

22.

The specific

eatcapacity

f a

substance

s

25.

defined

as the

amount

of

thermal

encrgy

required

o

(A) raisehe emperaturef thesubstancc

b Y l K

(B)

convert

unit

massof

the substance

from

iquid o

vaPour

(C)

convert

unit

massof

tlresubstallce

from solid

o

iquid

(D)

raise he emperature

f

unit

mass

f

thesubstance

Y

K

The

'glass-house'

effect

refers

o thc

glass-housectingas a hcat rap. This is

bccause

shon

wavelenglh,

nfra-rcd

ays rom

thesun

are

unable

o

pcnctratc

lass

long

wavclenglh,

nfra-rcd

ays

rom

thcsun

areunable

o

pcnetratc

lass

short

wavelcngth,

nfra-rcd

ays

iom

the objecs

within the

glass-house

areunable

o

penctrate

lass

26.

long

wavelcngth,

nfra-rcd

ays rom

the objccs

within ilre

glass-housc

areunablc

o

pcnctrate

lass

Whichof the

ollowing

wouldbe

consistcnt

with

the

kinctic hcory

of

gases?

The diagram

bove

hows

waterboiling

at

the

opof a

glass

cst

ube

while

a

picce

f

ice

rcmains nmelted

t thebottom.

Whichof

the following s a possible cason or this

occurrcnce?

(A)

Gauze

s

a

poor

conductor

f

hcat.

(B)

Watcr s a

poor

conductor

f

heat.

(C)

Watcr s

a

good

onductor

f

heat.

(D)

Glass

s

a

good

onductor

f

hcat.

Thehcat

rom a

ncarby

ire reachcs

s

mainly

by

(A)

conduction

y the

air

molccules

(B)

convcction

y tlrc

air

molcculcs

(C)

absorption

nd emission

by

the

air

molccules

(D)

radiation

23.

(A)

(B )

(c)

(D)

24,

u.

ut.

L

(A)

(B)

(c)

(D)

All

moleculcs

t

a

given

cmpcraturc

move

with the

same

spccdbut

in

diffcrcnt

directions.

Theheating f

a

gas

esuls

n ncrcased

kinctic ncrgy

f the

molcculcs.

Thcpressuref agason thccontain-

ing

walls s

produced

y

continual

bombardmcnt.

II

only

III

only

I and

I

only

II and

II only

Ice

wrapped

in

gauze

8/18/2019 cxc1995p1

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5

29.

7.

A fixed mass

of

gas

s

heated t

constant

pressure.

Which

of the

graphs

below

rcpresents

hc variation

f volume,

V,

with

Celsius

empcrature,?

Vlcmt

(A)

Which

of the ollowing

are

NOT

lransverse

waves?

Which

of

the following

diagrdms

ould

represent

iffraction

of

water waves

n a

ripple

ank?

il+il]i

(B)

(c)

(D)

(A)

(B)

(c)

(D)

Water

waves

n thesca

Radiowaves

ravellingrom

asatellite

Soundwaves

rom a

guitar

tring

Light waves

rom

a street

amp

The

ime

pcriod

f themotiori

s

(A)

0.1

(B)

0.2

(C)

0.3

(D)

0.4s

Thehearing

ange

f

a

normal

oung crson

is

about

30 .

Displacement/cm

4

2

0

- 2

- 4

(A)

(B)

(c)

(D)

20Hz

o 2

000

Hz

20Hz

o

20

000Hz

Z00Hz

o

2

000llz

200H2

o

20

000Hz

28.

(A)

(B)

(c)

(D)

DW

I

only

II

only

I and I

otrly

II

and II

only

Item

30

refers

o the

ollowing

graph

which

shows

he

variation

of

displacement

f a

particle

with

time.

3 1 .

8/18/2019 cxc1995p1

6/10

b

37.

2.

Whichof

he ollowingchanges

hen wave

is refracted

t a boundary?

I.

Velocity

II. Wavelength

IIL

Frequency

(A)

I

only

(B)

III

only

(C)

I

and I

only

(D)

I, I I

and

II

Which

of

the

ollowing

statementsrc

rue?

I.

Light s

said o

havc

a

dual

nature.

II.

Al l

electromagnetic aves

are

tnnsverse.

III.

All

elcctromagncticaves

ave

he

samc peed

n

glass.

(A)

I

and

I

only

(B)

I and II

only

(C)

II

and II

only

(D)

I;

II and

II

The

image

of a sl ide

produced

y a

slide-projcctors

(A) magnificd ndvirtual

(B)

rcaland nvcrted

(C)

formed

at the focal

point

of the

projector's

cns

(D)

thesame

way

up

as he

slide

A virtual

mage

(A)

has

no light

rays

actually

passing

through

t

is

alwaysmagnificd

canbeprojected ntoa scrccn

is

alwaysaterallynverted

Which

of the

ollowing

s

NOT

anexamplc

f

thcapplication

f total

ntemal

eflcction?

(A)

A

road

ign

it

by

ight

pipcs

(B)

A

stickappearing

entwhen

placed

in water

The

use

of

prisms

n binoculars

The

ormation

f amirage

nasunny

day

Which

of the ollowing

statements ust

be

truc f total ntemal

eflection

s

to

occur?

I.

Light must

be travelling rom

one

medium

o a less

opticallydense

mcdium.

II. The

angle

f

ncidence

ust

eequal

to

the angle

of

refraction.

III.

The

angle

of incidence

must

be

greater

han he

criticalangle.

IV. The

angle

f

refraction

must

be90".

(A)

i

and

I

only

(B)

I

and II

only

(C)

II

and II

only

(D) III and V only

Wren

a

person

s ong-sighted,

hich

of the

following

would

be rue?

I.

The mage

s ormed

chindhe

crina.

II.

The

condition an

be

correctcd

i[r

a

concave

cns.

III.

The

eycball s

too

ong

or the ens.

(A) I only

(B)

III

only

(C)

I

and

I

only

(D)

I, l I

and II

Item

39

refcrs

o the

ollowing

diagram.

From

the diagram

above,

a

real

produced

with

a converging

ens

object s ocated

(A)

bctween he optical

ccntreand

F

(B)

bctween

and nfinity

(C)

only

at F

(D)

only at 2F

33.

38.

34.

35.

(B)

(c)

(D)

(c)

(D)

rmage

s

when

hc

36.

39 .

8/18/2019 cxc1995p1

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1

Item

40

efers o he

ollowingdiagram

which

shows nobject,O,

which ormsan mage,I,

when

placed

n front

of a converging

ens.OI

is

the

principal

axis

of the

ens. The

path

of

one ay rom heobjectsshowngoing o the

image.

Themagnificationproduced

ythe

ens bove

canbe found

rom

the

ratio

(A)

oc

IC

Ir-

(B)

ird

(c)

(D)

Which

of the

ollowing

equals

kW h?

(A)

3.6

kJ

(B)

36

kJ

(c)

360

kJ

(D)

3

600 U

Which

of the

following

gives

he correct

international

olourcode

or

wiring

a

plug?

43.

WhichofthefollowingequationsCANNOT

beused o determinehe

powerdissipated

n

a

resistod

(A) P = I2R

(B)

p=

R

( C )

P = V I

Item

44

efers

o he

ollowingdiagramhich

showsa

coil carrying

a

cunentand

wrapped

around

a

wooden

ylinder.

Which row

of the table below shows he

magneticielddirections t X, Y andZ?

(A)

(B)

(c)

(D)

(D)

p=

#

40.

Y

44.

IP

o?

IP

E

4t.

42.

LIVE NEUTRAL

(A)

Brown Blue

(B)

Red

Blue

(C)

Blue

Greery'yellow

(D)

Green

Brown

Rectification

an

BEST

edone

y using

(A'

-'.U*-n

slormer

(B

?e5gp'r

lSl

-*"^.

,

dn

(t /

Dio

oe

EARTII

Green/yellow

Green

Brown

Blue

45.

8/18/2019 cxc1995p1

8/10

g

48.

6.

The

figure

above

shows

two

permancnt

magnets

nd

hrce

wires

carrying

urrent

n

the

dircctions

ndicated.

On

which

wire(s)

will

a

force

be

cxcrted'l

(A)

I

only

(B)

Il

only

(C)

I

arrd I

only

(D)

I, l l

and

II

Which

of

tJre

ollowing

diagrams

cprcscnts

the

electric

icld

existing

ctween

wo

oppo_

sitcly

charged

oint

charges?

(A)

+

(B)

+

(C) + -----T-r -

O O

In

he

diagram

bove,

picce

f

rubber

magnet

from

a

rcfrigerator

door

is

surrounded

y

plotting

ompasses.

hc

rubbcr

magnct

as

(A)

poles

at

he

cnds

(B)

poles

at

he

ccntre

(C)

poles

at rhe

sidcs

(D)

no

poles

Which

of

the ollowing

statcments

re

rue?

I.

Soft ron

s

morc

easily

magnctiscd

than

tccl

but.loses

ts

magnetism

much

morc

easily.

I I .

Stccl

s

uscd

or

thc making

of

frcrmanent

agnets.

III.

Magnets

aylose

heirmagnetism

f

hcated

o rcd

heal

(A) I and I only

(B)

II

and

II

onJy

(C)

I

and II

only

(D)

I, II

and

II

49.

47.

1 \

+ a

(D)

\ F

8/18/2019 cxc1995p1

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50.

q

5 1 .

n which

of the

ollowing

circuits

reall

of

the

componcntsonnected

n

scrics?

(A)

Which

of

the ollowing

cunent-time

raphs

would

represent

irectcuncnt?

I I

(B)

II I

(c)

(D)

(A)

(B )

(c)

(D)

II

only

III

only

I and II

only

I, ll

and II

52.

In

thesimple .c.

generatorshown

bove,lhe

parts

abelledX

are he

(A)

slipdngs

(B)

curved

pole

faces

(C)

carbonbrushes

(D)

split-ring ommutators

?s

8/18/2019 cxc1995p1

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i o

(A)

Which

f

he ollowing

rapts

BBST eprcsents

theoutput

f asimple .c.

generator?

(B)

(c)

(D)

II I

(A)

(B)

(c)

(D)

I

only

I and I

only

I

and II

only

I, II

and II

Which

ofthe

oUowing

raphs

ould

have

een

obtained iom

measurements ade

using he

circuitsassociated

ith

the

graph(s)?

ffi

r l

/

+

n

53.