Jamb Physics 2002 Past Questions and Answers

Question 1:

• 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

A. 3 : 5
B. 4 : 5
C. 7 : 10
D. 13 : 10

Question 2:

• 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

A. 3 : 5
B. 4 : 5
C. 7 : 10
D. 13 : 10

Question 3:

• 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

A. 20 %
B. 40 %
C. 50 %
D. 60 %

Question 4:

• 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]

A. 0.5 m
B. 0.6 m
C. 1.5 m
D. 2.0 m

Question 5:

• 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]

A. 40 N
B. 80 N
C. 120 N
D. 160 N