Q40 / 250 · NTA Abhyas (NEET) 2020 · Physics · Electrostatics

What is angle between electric field and equipotential surface?

Correct answer
A
$90 °$ always
B
$0 °$ always
C
$0 ° t o 90 °$
D
$0 ° t o 180 °$

Solution

Potential gradient along equipotential surface is zero.

i.e.,

E \cos θ = - \frac{d V}{d r} = 0

∴ θ = 90 °

Hence, the correct answer is option: 'A'.

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