A) \[{{\left( \frac{a}{b} \right)}^{2}}\]
B) \[{{\left( \frac{a}{b} \right)}^{3}}\]
C) \[2\pi \sqrt{\frac{{{a}^{2}}}{3G\lambda }}\]
D) \[\pi \sqrt{\frac{{{a}^{2}}}{2G\lambda }}\]
Correct Answer: C
Solution :
(c.)We know that, \[m=\frac{{{A}_{m}}}{{{A}_{c}}}\times 100%\] \[\Rightarrow \] \[75=\frac{{{A}_{m}}}{{{A}_{c}}}\times 100\] or \[75=\frac{{{A}_{m}}}{15}\times 100\] or, \[\frac{75}{100}\times 15={{A}_{m}}\] \[\Rightarrow \] \[{{A}_{m}}=\frac{3}{4}\times 15=\frac{45}{4}=1125V\]
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