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The electric potential V is givne as a f...

The electric potential `V` is givne as a function of distance `x` (metre) by `V = (5 x^(2) + 10x - 9)` volt. Value of electric field at `x = 1 `is

A

`20 V//m`

B

`6 V//m`

C

`11 V//m`

D

`-23 V//m`

Text Solution

Verified by Experts

The correct Answer is:
A
`E = - (dV)/(dx) = - (d)/(dx) = - (5x^(2) + 10x - 9) = - 10x - 10`
`:.(E)_(x = 1) = - 10 xx 1 - 10 = - 20 V//m`
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