The electric potential at point A is 60 V and at B is - 90 V. Find the work done by an external force and electrostatic force, respectively, in moving an electron slowly from B to A.
1
240 × 10-19 J and 240 × 10-19 J
2
Zero and 240 × 10-19 J
3
-240 × 10-19 J and 240 × 10-19 J
4
240 × 10-19 J and zero
5
Question Not Attempted