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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
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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
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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 .
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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
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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 .
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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 .
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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.
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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
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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
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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.