Question

There is $10$ units of charge at the centre of circle of radius $1\, m$. The work done in moving $1$ unit of charge once around the circle is :

• A. 150 unit
• B. 100 unit
• C. 10 unit
• D. zero

Answer 1

The Correct Option is D

Here charge at centre $=10$ units, radius of circle $(r)=10\, m$ and charge moved around circle $=1$ unit, we know that when the charge is at the centre of a circle, the circumference will be equipotential, so work done in moving a charge around the circle is zero.