The current I in an A.C. circuit inductance c | vedclass

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(D) The induced electromotive force $(emf)$ in an inductor is given by the formula $E = -L \frac{dI}{dt}$.In the first half of the time interval,the c

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(D) The induced electromotive force $(emf)$ in an inductor is given by the formula $E = -L \frac{dI}{dt}$.In the first half of the time interval,the current $I$ increases linearly with time,so the rate of change of current $\frac{dI}{dt}$ is a positive constant. Consequently,the induced $emf$ $E = -L \frac{dI}{dt}$ is a negative constant.In the second half of the time interval,the current $I$ decreases linearly with time,so the rate of change of current $\frac{dI}{dt}$ is a negative constant. Consequently,the induced $emf$ $E = -L \frac{dI}{dt}$ is a positive constant.Comparing this with the given options,the graph that shows a negative constant value followed by a positive constant value is represented by option $D$.

The current $I$ in an $A.C.$ circuit inductance coil varies with time according to the graph given below. Which one of the following graphs gives the variation of voltage with time?

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