Which appliance works on the principle of electromagnetic induction? MCQ with Answer and Explanation

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Which appliance works on the principle of electromagnetic induction?

A. Fuse

B. Induction cooker

C. Electric heater

D. Incandescent bulb

Answer: Option B

Solution (By JKExamLibrary)

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

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

The phenomenon of splitting of white light into its constituent colours is called

A. Scattering

B. Polarisation

C. Dispersion

D. Refraction

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Correct Answer: Option C

Explanation:
Dispersion happens because refractive index varies with wavelength. Prism, rainbow. Scattering is Tyndall effect (blue sky). Polarisation restricts vibrations.

This question belongs to: Science Physics

Question #2 Report Error

The property of a body to resist change in its state of motion is called

A. Weight

B. Force

C. Momentum

D. Inertia

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Correct Answer: Option D

Explanation:
Inertia is directly proportional to mass. Heavier object harder to accelerate/decelerate. Newton's first law defines inertia. Momentum is mass × velocity, depends on motion.

This question belongs to: Science Physics

Question #3 Report Error

A car travels first half distance at 40 km/h and second half at 60 km/h. Average speed is

A. 45 km/h

B. 50 km/h

C. 52 km/h

D. 48 km/h

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Correct Answer: Option D

Explanation:
Average speed = 2v₁v₂/(v₁+v₂) = 2×40×60/(40+60) = 4800/100 = 48 km/h. Not arithmetic mean (50). For equal distances, harmonic mean of speeds. If times equal, arithmetic mean applies.

This question belongs to: Science Physics

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