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The variation of potential with distance...

The variation of potential with distance R from the fixed point is shown in (Fig. 3.125).
.
The electric field at `R = 5 m` is.

A

`2.5 Vm^-1`

B

`-2.5 Vm^-1`

C

`0.4 Vm^-1`

D

`-0.4 Vm^-1`

Text Solution

Verified by Experts

The correct Answer is:
a
`E = - (d V)/( d r)` = negative of the slope of `V - r` garph.
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