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Physics Past Questions

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145 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10
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Past Questions

145 questions
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Question 1 of 5 145 total questions
Question 71
jamb 2002
If the distance between two suspended masses 10kg each is tripled, the gravitational force of attraction between them is reduced by
Aone half
Bone third
Cone quarter
Done ninth
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Question 72
jamb 2002

A body weighing 80N stands in an elevator that is about to move. The force exerted by floor on the body as the elevator moves upward with an acceleration of 5 ms-2 is
[g = 10ms-2]

A40 N
B80 N
C120 N
D160 N
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Question 73
jamb 2002

The hydrostatic blood pressure difference between the head and the feet of a boy standing straight is 1.65 x 104 Nm-2. Find the height of the boy.

[ Density of blood = 1.1 x 103 kgm-3, g = 10ms-2]

A0.5 m
B0.6 m
C1.5 m
D2.0 m
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Question 74
jamb 2002
A wheel and axle is used to raise a load of 500 N by the application of an effort of 250 N. If the radii of the wheel and the axle are 0.4 cm and 0.1 cm respectively, the efficiency of the machine is
A20 %
B40 %
C50 %
D60 %
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Question 75
jamb 2002

A copper cube weighs 0.25 N in air, 0.17N when completely immersed in paraffin oil and 0.15 N when completely immersed in water.The ratio of upthrust in oil to upthrust in water is

A3 : 5
B4 : 5
C7 : 10
D13 : 10
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