Electronics - Magnetism and Electromagnetism

Exercise :: Magnetism and Electromagnetism - Filling the Blanks

6. 

The induced voltage across a stationary conductor in a stationary magnetic field ___.

A. equals 0 V
B. is usually very large
C. varies with time
D. depends on the strength of the magnetic field

Answer: Option A

Explanation:

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7. 

When the speed at which a conductor is moved through a magnetic field is increased, the induced voltage will _____.

A. not be affected
B. equal 0 V
C. decrease
D. increase


Answer: Option D

Explanation:

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8. 

___ is the ability of a material to remain magnetized after removal of the magnetizing force.

A. Reluctance
B. Hysteresis
C. Retentivity
D. Induction

Answer: Option C

Explanation:

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9. 

Ferromagnetic materials have minute magnetic ___ created within their atomic structure by the orbital motion and spin of electrons.

A. forces
B. flux lines
C. domains
D. tapes

Answer: Option C

Explanation:

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10. 

The ___ is an electromagnetic device that contains a coil rotating on a jeweled bearing mount.

A. permanent-magnet speaker
B. d'Arsonval movement
C. single-pole, double-throw relay
D. crankshaft position sensor

Answer: Option B

Explanation:

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