A) \[0.4\,\,A{{m}^{2}}\]
B) \[1.6\,\,A{{m}^{2}}\]
C) \[20\,\,A{{m}^{2}}\]
D) \[8.0\,\,A{{m}^{2}}\]
Correct Answer: A
Solution :
\[M=mL=4\times 10\times {{10}^{-2}}=0.4A\times {{m}^{2}}\]
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