Question
The length of a simple pendulum is increased four times to its previous value while the mass is doubled. What is the ratio of the new and previous time period of the pendulum?
The correct answer is
2:5
Correct Answer: (b) 2:5
Explanation: The time period of a simple pendulum is T = 2π√(l/g). When the length is increased by a factor of 4, the period increases by a factor of 2. Hence, the new time period is 2 times the original time period.
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Important Questions from Oscillations & Waves
The frequency (f), wavelength (λ) and speed (v) of a sound wave are related as
- Which of the following best describes the shape of a sinusoidal wave signal during one complete cycle?
- Which among the following waves is not an electromagnetic wave?
- In which type of wave do particles of the medium move parallel to the direction of wave propagation?
- The interference of two identical waves moving in opposite directions produces:
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