The SI unit of charge is MCQ with Answer and Explanation

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The SI unit of charge is

A. Volt

B. Coulomb

C. Ampere

D. Ohm

Answer: Option B

Solution (By JKSSB Mock Tests)

Coulomb (C).

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Question #1

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The device that uses the principle of electromagnetic induction is

A. Resistor

B. Electric motor

C. Transformer

D. Electric bulb

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Correct Answer: Option C

Explanation:
Transformer, generator, dynamo use electromagnetic induction (Faraday's law). Motor uses magnetic effect of current. Bulb uses heating effect. Resistor limits current. Induction: changing flux induces emf.

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Question #2

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Binding energy per nucleon peaks at:

A. Uranium

B. Iron

C. Helium

D. Hydrogen

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Correct Answer: Option B

Explanation:
Maximum binding energy/nucleon ≈ 8.8 MeV at iron-56, making it most stable. Lighter nuclei release energy via fusion; heavier via fission. Memory tip: 'Iron peak: most stable nucleus; fusion before, fission after'. Nuclear physics concept frequently tested in competitive exams.

This question belongs to: Science Physics