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2009 - JAMB Physics Past Questions and Answers - page 2

11

When a pentavalent impurity is added to a pure semiconductor, it becomes

A
a p-type semiconductor
B
an n-type semiconductor
C
an insulator
D
an intrinsic semi-conductor
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12

The value of x, y and z respectively in the expression MxLyTz for the universal gravitational constant G are

A
2, -3, -2
B
-1, 3, -2
C
-1, 2, -3
D
-2, -1, 3
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13

An air craft attempt too fly due north at 100 kmh-1. If the wind blows against it from east to west at 60 kmh-1, its resultant velocity is

A
117 kmh-1, N31oE
B
127 kmh-1, N31oE
C
117 kmh-1, N31oW
D
127 kmh-1, N31oW
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14

A car accelerate uniformly from rest at 4 ms-2. How far will it travel in the fifth complete second?

A
100 m
B
50m
C
32 m
D
18 m
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15

A body of mass 12kg traveling at 4.2ms-1 collides with a second body of mass 18kg at rest. Calculate their common velocity if the two bodies coalesce after collision

A
1.5 ms-1
B
1.4 ms-1
C
2.1 ms-1
D
1.7 ms-1
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16

The terminal velocity of a ball-bearing falling through a viscous fluid reached when the

A
upthrust is equal to the weight of the ball
B
ball accelerate uniformly
C
upthrustis equal to the velocity of the ball
D
velocity is uniform
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17

The pressure of two moles of an ideal gas at a temperature of 27oC and volume 10-2m3 is

[R = 8.313 J mol-1K-1]

A
4.99 x 105 Nm-2
B
9.80 x 103 Nm-2
C
4.98 x 103 Nm-2
D
9.80 x 105 Nm-2
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18
The wave phenomenon demonstrated in the diagram above is
A
reflection
B
deflection
C
diffraction
D
refraction
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19
The diagram above represents the graph of the force F applied in stretching a spiral spring against the corresponding extension (X). The force constant of the spring is
A
20 Nm-1
B
40 Nm-1
C
30 Nm-1
D
10 Nm-1
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20

If a light wave has a wavelength of 500nm in air what is the frequency of the wave?

[c = 3 x 108 ms-1]

A
3.0 x 1014 Hz
B
6.0 x 1014 Hz
C
6.0 x 1012 Hz
D
2.5 x 1014 Hz
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