The frequency of a pendulum is 0.5 Hz. Its time period is MCQ with Answer and Explanation

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The frequency of a pendulum is 0.5 Hz. Its time period is

A. 2 s

B. 1 s

C. 0.5 s

D. 5 s

Answer: Option A

Solution (By JKSSB Mock Tests)

T = 1/f = 1/0.5 = 2 s.

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Question #1

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Beats used for:

A. Both

B. Sound speed measurement

C. Instrument tuning

D. Neither

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Correct Answer: Option A

Explanation:
Beats: tune instruments (zero beat = matched frequency); measure sound speed via known frequency difference. Memory tip: 'Beats: tuning and measurement applications'. Wave phenomenon application frequently tested in competitive exams.

This question belongs to: Science Physics

Question #2

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SI unit of luminous intensity:

A. Lux

B. Candela

C. Lumen

D. Watt

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Correct Answer: Option B

Explanation:
Candela (cd) is SI base unit for luminous intensity. Lumen: luminous flux; Lux: illuminance; Watt: power. Memory aid: 'Candela = candle power; base unit for perceived light'. Unit knowledge frequently tested in competitive exams.

This question belongs to: Science Physics