A charge 50 µc has electric field strength of 360 N...
A charge 50 µc has electric field strength of 360 NC-1 at a certain point. The electric field strength due to another charge 120 µc kept at the same distance apart and in the same medium is?
864 NC-1
150 NC-1
144 NC-1
18 NC-1
Correct answer is A
In general, electric field strength E = (F)/q
E = q4πε0d2
⇒ 360 = 9×109×50×10−6d2
solving, we have d2 = 1250
putting d2 = 1250 into the second equation,
E = 9×109×120×10−61250
we have E = 864NC−1