The audible range of sound for human beings is MCQ with Answer and Explanation

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The audible range of sound for human beings is

A. 20 Hz - 20,000 Hz

B. 200 Hz - 2000 Hz

C. 20 kHz - 200 kHz

D. 0 - 100 Hz

Answer: Option A

Solution (By JKSSB Mock Tests)

Standard audible range.

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Question #1

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The unit of electric potential is

A. Ohm

B. Coulomb

C. Volt

D. Ampere

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Correct Answer: Option C

Explanation:
Volt = J/C. Named after Alessandro Volta. Potential difference drives current. 1 V = 1 J of work per coulomb charge moved.

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Question #2

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Radioactivity was discovered by

A. Becquerel

B. Curie

C. Roentgen

D. Rutherford

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Correct Answer: Option A

Explanation:
Henri Becquerel discovered natural radioactivity in uranium salts (1896). Curie isolated radium, Rutherford classified rays.

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Question #3

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The centre of mass of a uniform semicircular ring of radius R lies at distance from centre

A. R/3

B. R/2

C. 2R/π

D. R/π

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Correct Answer: Option C

Explanation:
For semicircular ring, y_cm = 2R/π from centre.

This question belongs to: Science Physics

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