Jamb Physics 1984 Past Questions and Answers

Question 41:

• JAMB 1984

A galvanometer of resistance 5.0W has full-scale deflection for a current of 100mA. How would its range be extended to 1.0A? By placing a resistance of

A. \(\frac{5}{9}\)\(\Omega\) in parallel
B. \(\frac{9}{5}\)\(\Omega\) in series
C. 45\(\Omega\) in parallel
D. 45\(\Omega\) in series
E. \(\frac{9}{5}\)\(\Omega\) in parallel

Question 42:

• JAMB 1984

A simple pendulum, 0.6m long, has a period of 1.5s. What is the period of a similar pendulum of 0.4m length in the same location?

A. \( 1.5 \frac{ \sqrt{2}}{3} \)s
B. \( 1.5 \frac{ \sqrt{3}}{2} \)s
C. 2.25s
D. 1.00s
E. 2.00s

Question 43:

• JAMB 1984

What is the resistance of the circuit shown above

A. 4Ω
B. 11Ω
C. 19/5Ω
D. 17/4Ω
E. 8Ω

Question 44:

• JAMB 1984

A force varying linearly with the distance acts on a body as shown above, The work done on the body by the force during the first 10m of motion is

A. 100J
B. 150J
C. 200J
D. 300J
E. 600J

Question 45:

• JAMB 1984

A short bar magnet is placed in earth's magnetic field, as shown above, which of the points II and III are/is possible positions of a neutral point?

A. I only
B. II only
C. III only
D. I and II
E. I,II and III