Question

A charge of 5 coulombs is moved from A to B
into an electric field from infinity, when the work
done at point A is 20J and at point B is 32J.
Calculate the potential difference between points
A and B.
1) 4.2 V 2) 6.4 V 3) 2.4 V 4) 4.6 V
​

Answer 1

Answer:

Option 3 is correct

Explanation:

Q=5C

W(a)=20J

V(a)=W/Q=20/5=4V

W(b)=32J

V(b)=W/Q=32/5=6.4V

Potential difference across A and B=V(b)-V(a)

V=6.4V-4V=2.4V

Hence,Option 3 is correct.