A. 864 NC‾¹
B. 150 NC‾¹
C. 144 NC‾¹
D. 18 NC‾¹
Correct Answer: Option A
Explanation
In general, electric field strength E = (F)/q
E = q/4πε0d²
⇒ 360 = 9×109×50×10-6/d²
solving, we have d² = 1250
putting d² = 1250 into the second equation,
E = 9×109×120×10-6 /1250
we have E = 864NC‾¹
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