A) 2.5 amp
B) 3.5 amp
C) 1.5 amp
D) 0.5 amp
Correct Answer: D
Solution :
\[F={{10}^{-7}}\times \frac{2{{i}^{2}}}{a}\times l\]\[\Rightarrow 30\times {{10}^{-7}}={{10}^{-7}}\times \frac{2{{i}^{2}}}{0.15}\times 9\] \[\Rightarrow i=0.5A\]
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