A) 1 V
B) \[(\pi /4)V\]
C) \[(\pi /2)V\]
D) \[\pi \,V\]
Correct Answer: B
Solution :
[b] \[\left| \left. e \right| \right.=B\frac{dA}{dt}\] \[\left| \left. e \right| \right.=B\frac{({{A}_{2}}-{{A}_{1}})}{({{t}_{2}}-{{t}_{1}})}\Rightarrow \left| \left. e \right| \right.=\frac{1\left( \frac{\pi }{4}-0 \right)}{(1-0)}\] \[e=\frac{\pi }{4}V\]
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