According to class materials, which of the following statement is FALSE regardin

ID: 2084613 • Letter: A

Question

According to class materials, which of the following statement is FALSE regarding capacitors

and inductors.

1.(a) The capacitor is a short for signals at high frequency and the inductor is a short for

signals at low frequency.

2.(b) In purely resistive circuits, AC current are in sync with voltage: they start and end at

the same time

3.(c) In purely capacitive circuits, AC current in a capacitor lags the voltage across it by 90

degrees

4.(d) When an AC signal is applied to a series RC circuit, The resistance and reactance

simply add up to be impedance.

5.(e) none of (a) through (d) is false statement.

Option c is the false statement

The current through the capacitor leads the voltage across it by 90 degrees

We know that

I=c dv/dt

If v=sin(t)

Then

I=c cos(t)

= c Sin(t+90)

Therefore i leads v by 90°

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