A charge 50 c has electric field strength of 36... - JAMB Physics 2007 Question
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?
A
864 NC-1
B
150 NC-1
C
144 NC-1
D
18 NC-1
correct option: b
In general, electric field strength E = (F)/q
(qq)/4RE0 V2
∴if E1 = 360 NC-1 F = q1 E1 = q2E2
E2 = (q1E1)/q2
∴ E2 = (50 X 10-6 X 360)/120 X 10-6 = 150 NC -1
(qq)/4RE0 V2
∴if E1 = 360 NC-1 F = q1 E1 = q2E2
E2 = (q1E1)/q2
∴ E2 = (50 X 10-6 X 360)/120 X 10-6 = 150 NC -1
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