Question

Two point charges of 20 microcoloumb and 80 microcoloumb are placed 18 cm apart.find the position where the electric field is zero

Answer 1

Answer:

The electric filed is zero at 6 cm from 20 micro coulomb charge.

Explanation:

First point charge

Second point charge

Distance d = 18 cm

let x cm from 20 micro coulomb electric field would be zero.

According to the formula,

The electric field from a point charge 20 micro coulomb at point C.

The electric field from a point charge 80 micro coulomb at point C.

Net electric field at point C is zero

Thus,

Hence, The electric filed is zero at 6 cm from 20 micro coulomb charge.