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

$A$ capacitor of $50 \mu F$ is connected to a power source $V = 220 \sin 50 t$ (where $V$ is in volts and $t$ is in seconds). The value of the rms current (in amperes) is:

$A$ parallel plate capacitor having plates of radius $6 \text{ cm}$ has capacitance $100 \text{ pF}$. It is connected to a $230 \text{ V}$ a.c. supply with angular frequency $300 \text{ rad/s}$. The r.m.s. value of current is:

The capacitive reactance of a capacitor $C$ is $X \ \Omega$. Both the frequency of the $A.C.$ supply and the capacitance of the capacitor are doubled. The new capacitive reactance will be:

The voltage across a pure inductor is represented by the following diagram. Which of the following diagrams will represent the current?

Which of the following components of an $LCR$ circuit,with $ac$ supply,dissipates energy?

Vedclass Test Series

Exam Paper Generator

Online Exam Module