Which one of the following is the correct variation of voltage with time in the coil?
A)
B)
C)
D)
Correct Answer: D
Solution :
For inductor as we know induced voltage For t = 0 to t =T/2 \[V=L\frac{dI}{dt}=L\frac{d}{dt}\left( \frac{2{{I}_{0}}t}{T} \right)=\operatorname{constant},\] For \[t=T/2\]to \[t=T\] \[V=\frac{LdI}{dt}\left( \frac{-2{{I}_{0}}t}{T} \right)=-cons\tan t\] Therefore, answer will be represented by graph [d].
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