A) 8.0 A
B) 4.0 A
C) 2.0 A
D) 1.0 A
Correct Answer: A
Solution :
\[B={{\mu }_{0}}ni\Rightarrow i=\frac{B}{{{\mu }_{0}}n}\]\[=\frac{20\times {{10}^{-3}}}{4\pi \times {{10}^{-7}}\times 20\times 100}\] =\[7.9\,amp=8amp\]
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