Magnetism And Electromagnetism MCQ Questions & Answers | Electrical Engineering

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Section 1 Section 2

1.
Which of the following is a vector quantity?

A. Relative permeability

B. Magnetic field intensity

C. Flux density

D. Magnetic potential

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2.
What is the magneto-motive force (mmf) of a wire with 8 turns carrying three amperes of current?

A. 2,400 At

B. 240 At

C. 24 At

D. 2.4 At

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3.
Magnetism of a magnet can be destroyed by

A. heating

B. hammering

C. by inductive action of another magnet

D. by all above methods

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4.
Strength of an electromagnet can be increased by

A. increasing the cross-sectional area

B. increasing the number of turns

C. increasing current supply

D. all above methods

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5.
What is the magneto-motive force in a 75-turn coil of wire when there are 4 A of current through it?

A. 18.75 At

B. 30 At

C. 300 At

D. 187 At

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Magnetism and Electromagnetism - Section 2