The scientist who discovered the link between electricity and magnetism was MCQ with Answer and Explanation

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The scientist who discovered the link between electricity and magnetism was

A. Oersted

B. Maxwell

C. Coulomb

D. Faraday

Answer: Option A

Solution (By JKSSB Mock Tests)

Oersted found that current-carrying wire deflects compass needle.

This question belongs to: Science Physics

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Question #1

Latent heat of fusion ice = 336 kJ/kg. Heat to melt 3 kg ice at 0°C:

A. 112 kJ

B. 336 kJ

C. 1008 kJ

D. 672 kJ

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Correct Answer: Option C

Explanation:
Q = mL = 3×336 = 1008 kJ. Direct latent heat formula application. Memory tip: 'Phase change: Q = mL; no temperature change'. Calorimetry calculation frequently tested in competitive exams.

This question belongs to: Science Physics

Question #2

Which appliance works on the principle of electromagnetic induction?

A. Electric heater

B. Fuse

C. Incandescent bulb

D. Induction cooker

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Correct Answer: Option D

Explanation:
Induction cooker induces eddy currents in pan. Heater uses Joule heating.

This question belongs to: Science Physics

Question #3

Which of the following is an example of a non-contact force?

A. Gravitational force

B. Frictional force

C. Muscular force

D. Tension in string

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Correct Answer: Option A

Explanation:
Gravity, electrostatic, magnetic forces act without direct contact. Friction, tension, normal require contact. Field forces are non-contact.

This question belongs to: Science Physics

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