The SI unit of magnetic flux is MCQ with Answer and Explanation

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The SI unit of magnetic flux is

A. Henry

B. Weber

C. Gauss

D. Tesla

Answer: Option B

Solution (By JKExamLibrary)

Weber (Wb) = T·m².

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Question #1

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Work done against gravity in lifting a 5 kg mass through 2 m (g=10) is

A. 100 J

B. 50 J

C. 10 J

D. 25 J

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Correct Answer: Option A

Explanation:
W = mgh = 5×10×2 = 100 J.

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Question #2

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Archimedes' principle is used in

A. Thermometer

B. Barometer

C. Hydrometer

D. Seismograph

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Correct Answer: Option C

Explanation:
Hydrometer floats based on density, uses buoyancy principle.

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Question #3

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A magnetic field line indicates

A. Direction of current

B. Path of charged particle

C. Direction of electric field

D. Direction of force on a north pole

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Correct Answer: Option D

Explanation:
Magnetic field lines represent direction of force on an isolated north pole. They emerge from north and enter south. They never cross. Tangent gives field direction. Compass aligns along these lines.

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