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Question

The areas under the I-H hysteresis loop and B-H hysteresis loop are denoted by A1 and A2, then the ratio of A2A2 is given by

A
μ0
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B
1μ0
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C
1
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D
μ0
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Solution

The correct option is A μ0
The relation between B and H is given by
B=μ0(H+I)
db=μ0dH+μ0dl
HdB=μ0HdH+μ0Hdl
Also HdH=0
HdB=μ0Hdl
Area of B-H loop =μ0×areaoflHloop
A2=μ0A1
A1A2=μ0

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