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A toroid has 500 turns per metre length....

A toroid has 500 turns per metre length. If it carries a current of 2 A, the magnetic energy density inside the toroid is

A

`6.28 J//m^3`

B

`0.628 J//m^3`

C

`3.14 J//m^3`

D

`0.314 J//m^3`

Text Solution

Verified by Experts

The correct Answer is:
B
`U= ( B^2 )/( 2 mu_0) = ((mu_0 n i)2)/( 2 mu_0) = 0.628 J//m^3`
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