Question
Question: There is a uniform electric field in x-direction. If the work done by external agent in moving a cha...
There is a uniform electric field in x-direction. If the work done by external agent in moving a charge of 0.2 C through a distance of 2m slowly along the line making an angle 60° with x direction is 4 joule then the magnitude of E is-
A
3N/C
B
4 N/C
C
5 N/C
D
20 N/C
Answer
20 N/C
Explanation
Solution

AB = d = 2m
VA – VB = Ed cos 60 = Ed/2 = E
W(A ® B) External agent = q (VB – VA)