A) \[\pi \frac{{{\operatorname{R}}^{2}}}{{{a}^{2}}}\]
B) \[\pi \frac{{{a}^{2}}}{{{\operatorname{R}}^{2}}}\]
C) \[\frac{{{a}^{2}}}{{{\operatorname{R}}^{2}}}\]
D) None of the above
Correct Answer: A
Solution :
Option [a] is correct. Explanation: \[\frac{{{M}_{square}}}{{{M}_{circular}}}=\frac{NI{{A}_{square}}}{NI{{A}_{circular}}}=\pi {{\operatorname{R}}^{2}}/{{a}^{2}}\]
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