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2013 - JAMB Physics Past Questions and Answers - page 3

21

What will happen to the boiling point of pure water when it is heated in a place 30m below sea level?

A
It will be more than 100 oC
B
It will be last than 100 oC
C
It will still be at 100 oC
D
It will be fluctuating
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22

The rise or fall of a liquid in a narrow tube is because of the

A
viscosity of the liquid
B
surface tension of the liquid
C
friction between the walls of the tube and the liquid
D
osmotic pressure of the liquid
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23

The mechanism of heat transfer from one point to another through the vibration of the molecules of the medium is

A
covection
B
conduction
C
radiation
D
diffusion
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24

A wave that travels through stretched strings is known as

A
electromagnetic wave
B
micro wave
C
mechanical wave
D
seismic wave
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25

A transverse wave and a longitudinal wave travelling in the same direction in a medium differ essentially in their

A
frequency
B
amplitude
C
direction of vibration of the particles of the medium
D
period of vibration of the particles of the medium
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26

What is the velocity of sound at 100 oC if the velocity of sound at 0 oC is 340ms -1?

A
497m-1
B
440m-1
C
397m-1
D
240m-1
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27

If a sonometer has a fundamental frequency of 450HZ, what is the frequency of the fifth overtone?

A
2700Hz
B
456Hz
C
444Hz
D
75Hz
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28

A man 1.5m tall is standing 3m in front of a pinhole camera whose distance between the hole and the screen is 0.1m. What is the height of the image of the man on the screen?

A
0.05m
B
0.15m
C
0.30m
D
1.00m
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29

A ray of light passing through the centre of curvature of a concave mirror is reflected by the mirror at

A
0o
B
45o
C
90o
D
180o
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30

Total internal reflection will not occur when light travels from

A
water to air
B
water into glass
C
glass to air
D
glass into water
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