Question

Identical charges of magnitude Q are placed at n-1 corners of a regular polygon of n sides each corner of the polygon is at a distance r from the centre. What is the value of the field at the centre?

Answer 1

Answer:

If charges were kept at all corners resultant electric field would

have been zero. so, removal of one charge would result in the same electric field as due to one charge alone.

So, E=

r

2

KQ

.

Explanation:

If charges were kept at all corners resultant electric field would

have been zero. so, removal of one charge would result in the same electric field as due to one charge alone.

So, E=

r

2

KQ

.