We know that the formula relating instantaneous current and voltage in a capacit

Question

We know that the formula relating instantaneous current and voltage in a capacitor is this: i = C de/dt Knowing this, we can determine that if the capacitor voltage is a sine wave, then the inductor voltage will be a cosine wave, as shown in the diagram below: How much phase shirt (in degrees) is there between the voltage and current waveforms? Which waveform is leading and which waveform is lagging? Phase shift is 90 degree. with the capacitor voltage leading the capacitor current (by 90 degree) Phase shift is 90 degree, with the capacitor voltage lagging the capacitor current (by 90 degree) Phase shift is 45 degree. with the capacitor voltage leading the capacitor current (by 45 degree) Phase shirt is 45 degree, with the capacitor voltage lagging the capacitor current (by 45 degree) Phase shift is 0 degree, with the capacitor voltage in phase with the capacitor current.

Explanation / Answer

here clearly diagram shows capacitor volatge is sine and starting at t=0 with zero amplitude where as inductor current already started at some point and attain the maximum value at t=0.

So here inductor current started before capacitor voltage .i.e. inductor current leads the capacitor voltage by 90 degrees.

from given options b is correct

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