Magnetism and Electromagnetism - EEE Questions and Answers

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A magnetic field is made up of flux lines.

True

False

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Hysteresis is the number of lines of force per unit area in a magnetic field.

True

False

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If a conductor is moved back and forth at a constant rate in a constant magnetic field, the voltage in the conductor will reverse polarity.

True

False

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Materials with a low retentivity do not retain a magnetic field very well.

True

False

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Electromagnetic induction is the force that produces a magnetic field.

True

False

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The tesla is the unit of magnetic flux.

True

False

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Ampere-turn is the unit of magnetomotive force (mmf).

True

False

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A relay is an electromagnetically controlled mechanical device in which electrical contacts are opened or closed by a magnetizing current.

True

False

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Reluctance in a magnetic circuit is analogous to current in an electrical circuit.

True

False