A) \[2\times {{10}^{-4}}C\]
B) \[4\times {{10}^{-4}}C\]
C) \[6\times {{10}^{-4}}C\]
D) \[8\times {{10}^{-4}}C\]
Correct Answer: C
Solution :
Q = it = 20 × 10?6 × 30 = 6× 10?4 C
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