8.00 x 106NC-1
4.00 x 106NC-1
4.00 x 10-4NC-1
2.00 x 10-4NC-1
2.50 x 10-1NC-1
Correct answer is B
F = qE; E = F/q = 40/(1.0 x 10-5) = 4.0 x 106
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