In a regular polygon of n sides, each corner is at a distance r from the center . Identical charges are placed at ( n-1) corners . At the center, the intensity is E and the potential is `V`. The ratio ` V//E` has magnitude .

Options

A. nr
B. `(n-1)r`
C. `(n-1)//r`
D. `r(n-1)//n`

Answer

B

Explanation

`V=(n-1)(KQ)/(r), E=(KQ)/(r^(2))rArr V/E=(n-1)r`