Jamb Physics 1999 Past Questions and Answers

Question 41:

• JAMB 1999

The figure above represents a frictionless pulley system in which a weight W is in equilibrium with a weight of 40N. Find the value of W

A. 13.3N
B. 20.0N
C. 40.0N
D. 80.0N

Question 42:

• JAMB 1999

The diagram above shows a solid figure with base PQ and center of gravity G on a inclined plane. Which of the following statements is correct

A. The solid will fall over if the vertical line through G lies outside the base
B. The solid will fall over if the vertical line through lies inside the base
C. The solid will not fall over if the vertical line through G lies outside the base
D. The solid can never fall over

Question 43:

• JAMB 1999

The diagram above shows a lift pump with valves at P and Q. During a downward stroke of the piston

A. Both valves are open
B. P is open while Q is closed
C. P is closed while Q is open
D. Both valves are closed

Question 44:

• JAMB 1999

In the J-tube above, Y and X are on the same horizontal level and 30cm³ of air is trapped above Y when the atmospheric pressure is 75cm Hg, calculate the volume of air trapped above Y when 15cm Hg is now poured into the limb above X

A. 15 cm³
B. 25 cm³
C. 35 cm³
D. 45 cm³

Question 45:

• JAMB 1999

The diagram above represents a transverse electromagnetic wave travelling with speed 3.0 x 10⁸ms^-1. What is the frequency of the wave.

A. 3.0 x 10⁷Hz
B. 9.0 x 10⁷Hz
C. 1.0 x 10⁹Hz
D. 3.0 x 10⁹Hz