Question

You are given three circuit elements X, Y and Z. They are connected one by one across a given ac source. It is found that V and I are in phase for element X. V leads I by `(pi/4)` for element Y while I leads V by `(pi/4)` for element Z. Identify elements X, Y and Z.

Answer 1

Since the phase difference between V and I is zero, the element X is a resistor.

Since the voltage leads the current by `pi/4`, hence the element Y is an inductor.

And, since the current leads the voltage by `pi/4` 

Hence, the element Z is a capacitor.