Physics Past Questions and Answers

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 322:

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 323:

What is the resistance of the circuit shown above

A 4â„¦
B 11Ω
C 19/5â„¦
D 17/4â„¦
E 8â„¦

Question 324:

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 325:

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