The device used to convert mechanical energy into electrical energy is MCQ with Answer and Explanation

Question

Share Report Error

The device used to convert mechanical energy into electrical energy is

A. Transformer

B. Rectifier

C. Motor

D. Generator

Answer: Option D

Solution (By JKSSB Mock Tests)

Generator works on electromagnetic induction.

This question belongs to: Science Physics

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Physics Questions

Question #1

Share Report

A SONAR signal sent from a ship returns after 2 s. If speed of sound in water is 1500 m/s, depth of sea is

A. 750 m

B. 375 m

C. 3000 m

D. 1500 m

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option D

Explanation:
d = v t/2 = 1500×2/2 = 1500 m.

This question belongs to: Science Physics

Question #2

Share Report

A convex lens is immersed in water. Its focal length

A. Increases

B. Decreases

C. Remains same

D. Becomes infinite

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option A

Explanation:
Lens maker's formula: 1/f = (μ_lens/μ_medium - 1)(...). In water, relative refractive index reduces, so power decreases, focal length increases. Glass in water behaves less converging.

This question belongs to: Science Physics

Question #3

Share Report

The device used to convert mechanical energy into electrical energy using electromagnetic induction is

A. Rectifier

B. Transformer

C. Motor

D. Generator

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option D

Explanation:
Generator: coil rotated in magnetic field induces emf. Motor: opposite. Transformer: changes voltage, no moving parts. Rectifier: AC to DC.

This question belongs to: Science Physics

Explore All Physics MCQs