alleryStart learning →The electric field at 30 cm from a 2 microcoulomb point charge in air is about
A6 x 10^4 N/C
B2 x 10^5 N/C
C2 x 10^6 N/C
D6 x 10^5 N/C
Answer & Solution
Correct answer: B. 2 x 10^5 N/C
E = 9 x 10^9 x 2 x 10^-6 / (0.3)^2 = 1.8 x 10^4 / 0.09 = 2 x 10^5 N/C.
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