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1995 - JAMB Physics Past Questions and Answers - page 3

21

Which of the following is the exclusive property of a transverse wave?

A
diffraction
B
refraction
C
compression
D
polarization
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22

The wavelength of signals from a radio transmitter is 1500mm and the frequency is 200kHz. What is the wavelength for a transmitter operating at 100kHz?

A
7500m
B
300m
C
75m
D
15m
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23

The difference between sound waves and light waves is that sound waves

A
are transverse while light waves are longitudinal
B
require a medium to travel while light waves does not
C
can be diffracted but light waves cannot
D
cannot be reflected but light waves can
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24

The pitch of an acoustic device can be increased by

A
increasing the frequency
B
increasing the amplitude
C
decreasing the loudness
D
decreasing the intensity
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25

Total eclipse of the sun occurs when the

A
earth is between the moon and the sun
B
sun is between the moon and the earth
C
moon is between the sun and the earth
D
ozone layer is threatened
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26

What is the approximate critical angle for total internal reflection for diamond if the refractive index of diamond is 2.42?

A
21o
B
22o
C
23o
D
24o
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27

A real object is placed at a distance ucm in front of a curved mirror of focal length fcm. If the image is upright and magnified, then the mirror is

A
convex and u =2f
B
concave and u = 2f
C
convex and u = f
D
concave and u = f
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28

Which of the following pairs of colours gives the widest separation in the spectrum of white light?

A
Red and Violet
B
Green and Yellow
C
Red and Indigo
D
Yellow and Violet
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29

Two parallel plates at a distance of 8.0 x 10-3m apart are maintained at a p.d of 600 volts with the negative plate earthed. What is the electric field strength?

A
4.8 Vm-1
B
75.0Vm-1
C
4800.0Vm-1
D
75000.0Vm-1
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30

At different locations on the earth's surface, the earth's magnetic field is

A
the same in magnitude and direction
B
the same in magnitude but different in direction
C
different in both magnitude and direction
D
different in magnitude but different in direction
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