The device which converts mechanical energy into electrical energy is MCQ with Answer and Explanation

Question Report Error

The device which converts mechanical energy into electrical energy is

A. Motor

B. Rectifier

C. Transformer

D. Generator

Answer: Option D

Solution (By JKExamLibrary)

Generator uses electromagnetic induction to produce electricity from mechanical motion.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

Assertion (A): Fuse wire has high resistance and low melting point. Reason (R): It must melt to break circuit on overload.

A. Both A and R true, R not correct explanation

B. Both A and R true, R correct explanation

C. A true, R false

D. A false, R true

View Answer & Solution Discuss

Correct Answer: Option B

Explanation:
High resistance produces more heat (I²R), low melting point ensures quick melting. Both true and R explains A.

This question belongs to: Science Physics

Question #2 Report Error

A body of mass 2 kg is moving with an acceleration of 5 m/s². The rate of change of its momentum is:

A. 10 N

B. 2.5 N

C. 10 kg m/s

D. 0.4 N

View Answer & Solution Discuss

Correct Answer: Option A

Explanation:
According to Newton's Second Law of Motion, the rate of change of momentum is directly proportional to the applied unbalanced force. Rate of change of momentum = Force = mass × acceleration. Force = 2 kg × 5 m/s² = 10 Newtons (N). Note that '10 kg m/s' is a unit of momentum, not its rate of change.

This question belongs to: Science Physics