| 1. | \(1~\text{s}\) | 2. | \(2~\text{s}\) |
| 3. | \(3~\text{s}\) | 4. | \(4~\text{s}\) |
| Assertion (A): | If the length of a simple pendulum increases by \(4\text{%},\) the percentage change in the time period is \(2\text{%}.\) |
| Reason (R): | The time period of a simple pendulum is directly proportional to the square root of its length. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
If the length of a pendulum is made 9 times and mass of the bob is made 4 times , then the value of time period becomes
(1) 3T
(2) 3/2T
(3) 4T
(4) 2T
For a simple pendulum, a graph is plotted between its kinetic energy (\(KE\)) and potential energy (\(PE\)) against its displacement \(d\). Which one of the following represents these correctly? (graphs are schematic and not drawn to scale)
| 1. | 2. | ||
| 3. | |
4. |
A pendulum is hung from the roof of a sufficiently high building and is moving freely to and fro like a simple harmonic oscillator. The acceleration of the bob of the pendulum is \(20\text{ m/s}^2\) at a distance of \(5\text{ m}\) from the mean position. The time period of oscillation is:
1. \(2\pi \text{ s}\)
2. \(\pi \text{ s}\)
3. \(2 \text{ s}\)
4. \(1 \text{ s}\)
A pendulum has time period T. If it is taken on to another planet having acceleration due to gravity half and mass 9 times that of the earth then its time period on the other planet will be
(1)
(2) T
(3)
(4) T
A pendulum oscillates about its mean position \(\mathrm{C}.\) The position where the speed of the bob becomes maximum is: (ignore all dissipative forces)

| 1. | \(\mathrm{A}\) | 2. | \(\mathrm{B}\) |
| 3. | \(\mathrm{C}\) | 4. | \(\mathrm{D}\) |
| Assertion (A): | If a pendulum is suspended in a lift and the lift is falling freely, then its time period becomes infinite. |
| Reason (R): | The free-falling body has acceleration equal to the acceleration due to gravity. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
In a simple pendulum, the period of oscillation T is related to length of the pendulum l as
(1) =constant
(2) =constant
(3) =constant
(4) =constant
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4. | ![]() |