Hard steel is suitable for making permanent magnets because
A. It has good residual magnetism
B. Its hysteresis loop has large area
C. Its mechanical strength is high
D. Its mechanical strength is low
Answer: Option A
This Question Belongs to Electrical Engineering >> Magnetic Circuit
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B. Current
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Point out the wrong statement. Magnetic leakage is undesirable in electric machines because it
A. Lowers their power efficiency
B. Increases their cost of manufacture
C. Leads to their increased weight
D. Produces fringing
Laminated cores, in electrical machines, are used to reduce
A. Copper loss
B. Eddy current loss
C. Hysteresis loss
D. All of the above
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