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What is the frequency on the pendulum of a wall clock if its time period is $0.2 s$ ?

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2 Hz

3 Hz

4 Hz

5 Hz

answer is D.

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Detailed Solution

5 Hz

is the frequency on the pendulum of a wall clock if its time period is

0.2 s

.
Time period,

T = 0.2 \sec

Since the frequency is the reciprocal of its time period, we will get the frequency by taking the reciprocal of the given value of the time period.
Thus,

\Rightarrow f = \frac{1}{T}

⇒

f = \frac{1}{0.2}

∴

f = 5 Hz

"One frequency of oscillation is defined as the number of cycles a wave travels in a second." The unit of frequency is Hertz, and the time period is calculated in seconds. Since the frequency is the time period's reciprocal, the frequency unit becomes the second's reciprocal. i.e., per second, which is also known as Hertz.

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