Electrical Engineering - Magnetism and Electromagnetism

Exercise :: Magnetism and Electromagnetism - True or False

1. 

Lenz's law defines the polarity of the induced voltage.

A. True
B. False

Answer: Option A

Explanation:

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2. 

A magnetic field is made up of flux lines.

A. True
B. False

Answer: Option A

Explanation:

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3. 

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

A. True
B. False

Answer: Option B

Explanation:

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4. 

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.

A. True
B. False

Answer: Option A

Explanation:

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5. 

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

A. True
B. False

Answer: Option A

Explanation:

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