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Figure shows some of the equipotential s...

Figure shows some of the equipotential surfaces of the magnetic scalar potential. Find the magnetic field `B` at a point in the region.

A

`10^(-4)T`

B

`0.5xx10^(-4)T`

C

`2xx10^(-4)T`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
As, is clear from figure

`DeltaV=(0.2-0.1)10^(-4)Tm`
`Deltax=xsin 30^(@)=0.1xx(1)/(2)`
`therefore |B|=(DeltaV)/(Deltax)=(0.1xx10^(-4))/(0.1//2)=2xx10^(-4)T`
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