A) remain constant.
B) become quarter of the initial value.
C) become four fold.
D) get doubled.
Correct Answer: C
Solution :
\[\varepsilon =Blv,\,I=\frac{\varepsilon }{r}=\frac{Blv}{R},P={{I}^{2}}R=\frac{{{B}^{2}}{{l}^{2}}{{v}^{2}}}{R}\] i.e., \[P\propto {{v}^{2}}.\] Hence, the correction option is [c].
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