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A current of 2A flowing through a coil o...

A current of `2A` flowing through a coil of `100` truns give rise to a nagnetic flux of `5xx10^(-5)Wb` per turn. Magnetic energy associated with cooil is

A

`5J`

B

`0.5J`

C

`0.05J`

D

`0.005J`

Text Solution

Verified by Experts

The correct Answer is:
D
`phi'=Nphi=Li`
`100xx5xx10^(-5)=Lxx2 implies L=2.5xx10^(-3)H`
`U=(1)/(2)Li^(2)=(1)/(2)xx2.5xx10^(-3)xx(2)^(2)=5xx10^(-3)=0.005J`
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