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