# Sulvme!

### Unified Tertiary Matriculation Examination Physics 2010

1:

Which physics Question Paper Type is given to you?

A:

Type A

B:

Type B

C:

Type C

D:

Type D

E:

Type B

2:

Two cars moving in the same direction have speeds of 100 kmh-1 and 130 kmh-1. What is the velocity of the faster car as measured by an observer in the slower car?

A:

130 kmh-1

B:

230 kmh-1

C:

200 kmh-1

D:

30 kmh-1

E:

No option

3:

The diagram below shows a velocity-time graph. The statement that is true about this motion is that, the car

A:

decelerates between points F and H

B:

accelerates between points F and G

C:

has a constant speed between points E and F

D:

has no acceleration between point F and G

E:

coming

4:

A stone and a feather are dropped from the same height above the earth surface. Ignoring air resistance, which of the following is correct?

A:

The stone and the feather will both reach the ground at the same time

B:

The stone will reach the ground first

C:

The feather will reach the ground first

D:

The feather will be blown away by the wind while the stone will drop steadily

E:

No option

5:

A car moves with an initial velocity of 25 ms-1 and reaches a velocity of 45 ms-1 in 10s. What is the acceleration of the car?

A:

5 ms-2

B:

25 ms-2

C:

20 ms-2

D:

2 ms-2

E:

No option

6:

An object is weighted at different locations on the earth. What will be the right observation?

A:

Both the mass and weight vary

B:

The weight is constant while the mass varies

C:

The mass is constant while the weight varies

D:

Both the mass and weight are constant

E:

No option

7:

The diagram below represents balls in an undulating surface. Which of the following options represents positions of stable equilibrium?

A:

II, V and VIII

B:

I, IV and VII

C:

III, VI and IX

D:

III, IV and VIII

E:

No option

8:

A bob of weight 0.1N hangs from a massless string of length 50cm. A variable horizontal force which increases from zero is applied to pull the bob until the string makes an angle of 600 with the vertical. The work done is

A:

0.250 J

B:

0.025 J

C:

0.050 J

D:

0.500 J

E:

No option

9:

The surfaces of conveyor belts are made rough so as to

A:

prevent the load from slipping

B:

make them stronger

C:

enable them to carry more load

D:

protect them while carrying loads

E:

No option

10:

A machine of velocity ratio 6 requres an effort of 400 N to raise a load of 800 N through 1m. Find the efficiency of the machine.

A:

50.0%

B:

22.2%

C:

33.3%

D:

55.6%

E:

No option

11:

If a wire 30cm long is extended to 30.5cm by a force 300N. Find the strain energy of the wire:

A:

7.50J

B:

750.00J

C:

75.00J

D:

0.75J

E:

No option

12:

In a hydraulic press, the pump piston exerts a pressure of 100 Pa on the liquid. What force is exerted in the second piston of cross-sectional area 3m2

A:

200N

B:

100N

C:

150N

D:

300N

E:

No option

13:

The accurate measurement of the relative density of a substance in its powdered form is done with a beam balance and

A:

an eureka can

B:

a burette

C:

a pipette

D:

a density bottle

E:

No option

14:

A hydrometer is an instrument used in measuring

A:

density of liquid

B:

relative density of a liquid

C:

relative humidity of a liquid

D:

vapour pressure of a liquid

E:

No option

15:

One special advantage of alcohol over mercury as a thermometric liquid is its

A:

low freezing point

B:

low boiling point

C:

high specific heat capacity

D:

low density

E:

No option

16:

Two metals P and Q of lengths l1 and l2 are heated through the same temperature difference. If the ratio of the linear expansivities of P to Q is 2:3 and the ratio of their lengths is 3:4. What is the ratio of increase in lengths of P to Q?

A:

5:7

B:

2:1

C:

1:2

D:

7:5

E:

No option

17:

The density of a certain oil on frying becomes 0.4 kgm-3 with a volume of 20 m-3. What will be its initial volume when its initial density is 0.8 kgm-3 assuming no loss of oil due to spillage?

A:

10 kgm-3

B:

5 kgm-3

C:

8 kgm-3

D:

12 kgm-3

E:

No option

18:

Heat is radiated by all hot objects in the form of

A:

light energy

B:

solar energy

C:

infrared rays

D:

x-rays

E:

No option

19:

If a container is filled with ice to the brim, what happens to the level of water when the ice completely melts?

A:

The water in the glass overflows

B:

The level of water drops

C:

The level of water remains unchanged

D:

The level of water goes up

E:

No option

20:

The small droplet of water that forms on the grass in the early hours of the morning is

A:

dew

B:

mist

C:

fog

D:

hail

E:

No option

21:

A vapour is said to be saturated when

A:

a dynamic equilibrium exists such that more molecules return to the liquid than are leaving it

B:

the vapour pressure is atmospheric

C:

the temperature of the vapour varies

D:

a dynamic equilibrium exists between liquid, molecules and the vapour molecules

E:

No option

22:

The pressure of one mole of an ideal gas of volume 10-2m3 at a temperature of 270C is

(Molar gas constant = 8.3 J mol-1K-1)

A:

$2.24 \times 10^{4} NM^{-2}$

B:

$2.24 \times 10^{5} NM^{-1}$

C:

$2.49 \times 10^{5} NM^{-1}$

D:

$2.49 \times 10^{4} NM^{-2}$

E:

No option

23:

Which of the following has no effect on radiation ?

A:

density

B:

temperature

C:

surface area

D:

nature of the surface

E:

No option

24:

The wavelength of a wave travelling with a velocity of 420 ms-1 is 42m. What is its period?

A:

1.0s

B:

0.1s

C:

0.5s

D:

1.2s

E:

No option

25:

The sound of an electric bell dies slowly when air is slowly pumped out from a bottle because

A:

sound cannot pass through the bottle

B:

sound can pass through a vacuum

C:

sound needs a material medium

D:

the wavelength of sound becomes greater in the bottle

E:

No option

26:

During a thunderstorm, the sound is heard over a long time. This phenomenon is referred to as

A:

refraction of sound

B:

reverberation

C:

superposition

D:

diffraction of sound

E:

No option

27:

The velocity of sound in air at 160C is 340ms-1. What will it be when the pressure is doubled and its temperature raised to 1270C?

A:

4,000 ms-1

B:

160,000 ms-1

C:

8,000 ms-1

D:

400 ms-1

E:

No option

28:

In comparing the camera and the human eye, the film of the camera functions as the

A:

iris

B:

pupil

C:

cornea

D:

retina

E:

No option

29:

An object 4cm high is placed 15cm from a concave mirror of focal length 5cm. The size of the image is

A:

3cm

B:

5cm

C:

4cm

D:

2cm

E:

No option

30:

An object is embedded in a block of ice, 10cm below the plane surface. If the refractive index of the ice is 1.50, the apparent depth of the object below the surface is

A:

6.77cm

B:

7.63cm

C:

7.50cm

D:

2.50cm

E:

No option

31:

Which of the following is used for the correction of short-sightedness?

A:

concave lens

B:

concave mirror

C:

convex mirror

D:

convex lens

E:

No option

32:

Dispersion occurs when white light passes through a glass prism because of the

A:

different speeds of the colours in the glass

B:

high density of the glass

C:

defects in the glass

D:

different hidden colours in the glass

E:

No option

33:

When a positively charged rod is brought nearer the cap of a positively charged electroscope, the leaves divergence will

A:

converge

B:

remain constant

C:

diverge

D:

be induced

E:

No option

34:

Three capacitors of capacitance, $2 \mu F$, $4 \mu F$ and $8 \mu F$ are connected in parallel and a p.d of 6V is maintained across each capacitor, the total energy stored is

A:

$6.90 \times 10^{-6} J$

B:

$6.90 \times 10^{-4} J$

C:

$2.52 \times 10^{-4} J$

D:

$2.52 \times 10^{-6} J$

E:

No option

35:

A cell of emv 12V and internal resistance $4 \Omega$ is connected to an external resistor of resistance $2 \Omega$. Find the current flow

A:

4A

B:

2A

C:

3A

D:

5A

E:

No option

36:

The diagram below shows a balanced metre bridge, the value of x is

A:

66.7cm

B:

25.0cm

C:

33.3cm

D:

75.0cm

E:

No option

37:

Three $4 \Omega$ resistors connected in parallel have a potential difference of 16V applied across them. What is the total current in the circuit?

A:

12A

B:

8A

C:

10A

D:

14A

E:

No option

38:

In the diagram below, a 200W bulb is lighted by a 240V a.c mains supply. If 1kWh is sold at #40, the cost of keeping the bulb lighted for a day is

A:

#192.00

B:

#1.92

C:

#19.20

D:

#1920.00

E:

No option

39:

Power supply is transmitted at a very high voltage and low current in order to

A:

increase the power supply

B:

prevent overheating the coil

C:

make it travel fast

D:

make it pass through the transformers

E:

No option

40:

In the diagram below, if the south-poles of two magnets stroke a steel bar, the polarities at T and V will respectively be

A:

north and south

B:

south and south

C:

north and north

D:

south and north

E:

No option

41:

A galvanometer with full-scale deflection of 10 mA is to be converted to a voltmeter with full-scale deflection of 5V. If a series resistance of $498 \Omega$ is used for the conversion, the resistance of the galvanometer is

A:

$2 \Omega$

B:

$10 \Omega$

C:

$5 \Omega$

D:

$1 \Omega$

E:

No option

42:

Two  inductors of inductances 5 mH and 15 mH are connected in series and a current of 5 A flows through them. The total energy stored in the inductors is

A:

250.0J

B:

50.0J

C:

62.5J

D:

500.0J

E:

No option

43:

In alternating current circuit at resonance, the angle of lead or lag is

A:

$\frac{\pi^{0}}{2}$

B:

$0^{0}$

C:

$\frac{\pi^{0}}{3}$

D:

$\pi^{0}$

E:

No option

44:

In Faraday's law of electrolysis, a graph of mass deposited against the quantity of electricity is plotted. The slope of the graph gives

A:

the electrochemical equivalent

B:

the charge released

C:

the current flowing

D:

the energy released

E:

No option

45:

In a discharge tube, most of the gas is pumped out so that electricity is conducted at

A:

steady voltage

B:

low pressure

C:

high pressure

D:

low voltage

E:

No option

46:

The radioisotope $_{92}^{235}\textrm{U}$ decays by emitting two alpha particles, three beta particles and a gamma ray. What is the mass and atomic numbers of the resulting daughter element?

A:

91 and 227

B:

92 and 238

C:

227 and 91

D:

215 and 88

E:

No option

47:

The ground state energy for a hydrogen atom is $5.4 \times 10^{-19}Hz$. If an electron drops from zero energy to ground state, calculate the frequency of the emitted radiation.

***

A:

$2.0 \times 10^{16}Hz$

B:

$2.0 \times 10^{15}Hz$

C:

$5.0 \times 10^{15}Hz$

D:

$5.0 \times 10^{16}Hz$

E:

No option

48:

Transistors are used for the

A:

conversion of a.c to d.c

B:

conversion of d.c to a.c

C:

amplification of signals

D:

rectification of signals

E:

No option

49:

A typical transistor characteristics is represented as

A:

a

B:

b

C:

c

D:

d

E:

No option

50:

Which of the following is a pure semiconductor?

A:

silicon

B:

phosphorus

C:

transistor

D:

carbon

E:

No option