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A circular iron, core supports N turns ....

A circular iron, core supports N turns . If a current I produces a magnetic flux `phi` across the core's cross section, then then magnetic energy is :-

A

`I phi`

B

`(1)/(2)I phi`

C

`I phi`

D

`I^(2) phi`

Text Solution

Verified by Experts

The correct Answer is:
b
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