The scientist who gave the law of inertia was MCQ with Answer and Explanation

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The scientist who gave the law of inertia was

A. Galileo

B. Copernicus

C. Newton

D. Kepler

Answer: Option A

Solution (By JKSSB Mock Tests)

Galileo first proposed concept of inertia. Newton formalized.

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Question #1

The unit of magnetic field strength is

A. Weber

B. Tesla

C. Henry

D. Farad

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Correct Answer: Option B

Explanation:
Tesla (T) = N/(A·m) = Wb/m². Weber is magnetic flux. Henry is inductance. Farad is capacitance. Gauss is another unit (1 T = 10⁴ G).

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Question #2

A wave completes 20 oscillations in 4 seconds. Frequency is

A. 0.2 Hz

B. 80 Hz

C. 5 Hz

D. 4 Hz

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Correct Answer: Option C

Explanation:
f = 20/4 = 5 Hz.

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Question #3

Sound waves cannot travel through

A. Water

B. Steel

C. Air

D. Vacuum

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Correct Answer: Option D

Explanation:
Sound requires material medium. Vacuum has no particles.

This question belongs to: Science Physics

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