A pendulum clock that keeps the correct time on the earth is taken to the moon. It will run: (Take \(g_{\text{moon}}=\dfrac{g_\text{earth}}{6}\))

A pendulum clock keeping correct time is taken to high altitudes,

1. it will keep correct time

2. its length should be increased to keep correct time

3. its length should be decreased to keep correct time

4. it cannot keep correct time even if the length is changed

The free end of a simple pendulum is attached to the ceiling of a box. The box is taken to a height and the pendulum is oscillated. When the bob is at its lowest point, the box is released to fall freely. As seen from the box during this period, the bob will

1. continue its oscillation as before

2. stop

3. will go in a circular path

4. move on a straight line

The motion of a torsional pendulum is

(a) periodic

(b) oscillatory

(c) simple harmonic

(d) angular simple harmonic

Choose the correct option:

1. (a), (b) and (c)

2. (b), (c) and (d)

3. (a), (b) and (d)

4. All of these