For obtaining wattless current . . . . . . is | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) Wattless current is defined as the current in an $AC$ circuit for which the average power consumed is zero.Power in an $AC$ circuit is given by $P

Vedclass · Accepted Answer

Only $L$

Vedclass · Answer

(C) Wattless current is defined as the current in an $AC$ circuit for which the average power consumed is zero.Power in an $AC$ circuit is given by $P = V_{rms} I_{rms} \cos \phi$, where $\phi$ is the phase angle between voltage and current.For $P$ to be zero, $\cos \phi$ must be zero, which implies $\phi = 90^{\circ}$.In a purely inductive circuit (Only $L$) or a purely capacitive circuit (Only $C$), the phase difference between voltage and current is $90^{\circ}$.Therefore, in a circuit containing only an ideal inductor (Only $L$) or only an ideal capacitor, the power factor $\cos 90^{\circ} = 0$, resulting in wattless current.Among the given options, Only $L$ is the correct choice.

For obtaining wattless current . . . . . . is connected with ac supply.

Similar Questions

What is the phase difference between voltage $V$ and current $I$ in an $AC$ circuit containing only a capacitor?

$A$ $15.0 \; \mu F$ capacitor is connected to a $220 \; V, 50 \; Hz$ source. Find the capacitive reactance and the current ($rms$ and peak) in the circuit. If the frequency is doubled,what happens to the capacitive reactance and the current?

In the case of an inductor,

What is a resistive circuit? Write the formula for the power consumed in it.

In an a.c. circuit with pure capacitance $C$ and a.c. source $E=E_0 \sin \omega t$,the equation of instantaneous current is given by

Vedclass Test Series

Exam Paper Generator

Online Exam Module