2002 - JAMB Physics Past Questions and Answers - page 5
41
The particle that is responsible for the nuclear fission in a nuclear reactor is
A
neutron
B
prton
C
electron
D
photon
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42
A transistor is used in the amplification of signals because it
A
controls the flow of current
B
consumes a lot of power
C
allows doping
D
contains electron and hole carriers
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43
The carbon-granules microphone works on the principle of change in
A
inductance
B
resistance
C
capacitance
D
voltage
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44
At what frequency would a capacitor of 2.5μF
used in radio circuit have a resistance of 250Ω
used in radio circuit have a resistance of 250Ω
A
π/800 Hz
B
800/π Hz
C
200π Hz
D
2000π Hz
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45
A current of 0.5 A flowing 3h Deposits 2g of metal during electrolysis. The quantity of the same metal that would be deposited by the currents of 1.5A flowing in 1h is
A
2g
B
6g
C
10g
D
18g
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46
Which of the following statements is true of the properties of a moving coil galvanometer?
A
THe coil has a small area
B
There are strong hair springs to gives a large control panlel
C
There is a strong permanent magnet to give high magnetic flux
D
it has a small number of turns of coil
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47
A bead travelling on a straight line wire is brought to rest at 0.2 by friction. IF the ,mass of the bead is 0.01kg and the coefficient of friction between the bead and the wire is 0.1, determine the work one by the friction
[g = 10ms2
[g = 10ms2
A
2 x 10-4
B
2 x 10-3
C
2 x 101
D
2 x 102
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48
If the total force acting on a particle is zero, the linear momentum will
A
Increase
B
Decrease
C
Be Constant
D
Increase then decrease
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49
The colours seen on soap bubbles are due to
A
Diffraction
B
Refraction
C
Dispersion
D
Interference
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