alleryStart learning →A 1 microcoulomb charge sits on a sphere of radius 10 cm. What is the field 30 cm from the centre?
A1 x 10^5 N/C
B9 x 10^5 N/C
C3 x 10^4 N/C
D9 x 10^4 N/C
Answer & Solution
Correct answer: A. 1 x 10^5 N/C
E = 9e9 x 1e-6 / (0.3)^2 = 9e3/0.09 = 1e5 N/C.
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