Electronics - Magnetism and Electromagnetism

Why Electronics Magnetism and Electromagnetism?

In this section you can learn and practice Electronics Questions based on "Magnetism and Electromagnetism" and improve your skills in order to face the interview, competitive examination and various entrance test (CAT, GATE, GRE, MAT, Bank Exam, Railway Exam etc.) with full confidence.

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You can easily solve all kind of Electronics questions based on Magnetism and Electromagnetism by practicing the objective type exercises given below, also get shortcut methods to solve Electronics Magnetism and Electromagnetism problems.

Exercise :: Magnetism and Electromagnetism - General Questions

1. 

Permeability is the inverse equivalent of which electrical term?

A. Voltage
B. Current
C. Resistance
D. Conductance

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

2. 

Which electromagnetic device uses brushes and a commutator?

A. A speaker
B. A dc generator
C. A relay
D. A solenoid

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

3. 

What is the flux density of a magnetic field whose flux is 3000 µWb and cross-sectional area is 0.25 m2?

A. 12,000 mu.gifT
B. 83,330 T
C. 0 T
D. More information is needed in order to find flux density.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

4. 

How much flux is there in a magnetic field when its flux density is 5000 mu.gifT and its cross-sectional area is 300 mm2?

A. 16.67 mWb
B. 5.0 mu.gifWb
C. 3.0 mWb
D. 1.5 mu.gifWb

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

5. 

What are the effects of moving a closed wire loop through a magnetic field?

A. A voltage is induced in the wire.
B. A current is induced in the wire.
C. The polarity across the wire depends on the direction of motion.
D. All of the above

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.