Calculate the number of oscillations a simple pendulum does in 2 minutes if its time period is 0.5 seconds.

120

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240

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360

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480

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Solution

The correct option is B
240

Frequency is defined as the number of oscillations per second.
Time taken for 1 oscillation = 0.5 s
No. of oscillation in 1s = 2
No. of oscillation in 120 s = 240

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