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49 questions

Question 1 of 9 49 total questions

Question 21

jamb 2002

A coin place below a rectangular glass block of thickness 9cm and refractive index 1.5 is viewed vertically above the block. The apparent displacement of the coin is

A3 cm

B5 cm

C6 cm

D8 cm

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Question 22

jamb 2002

The effect of a particle in a fluid attaining its terminal velocity is that the

Aacceleration is maximum

Bweight is equal to the retarding force

Cbuoyancy force is equal to the to the viscous retardind force

Dbuoyancy force is more than the weight of the fluid displaced

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Question 23

jamb 2002

A particle in circular motion performs 30 oscillation in 6 seconds. Its angular velocity is

A5 rad s^-1

B6 rad s^-1

C5π rad s^-1

D10π rad s^-1

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Question 24

jamb 2002

Two force each of 10N acts on a body, one towards the north and the other towards the east.
The magnitude and the direction of the resultant force are

A20N, 45°E

B20N, 45°W

C10√2N, 45°W

D10√2N, 45°E

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Question 25

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 26

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 27

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 28

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 29

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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