If a sinusoidal wave has frequency of 50 Hz with 30 A r.m.s. current which of the following equation represents this wave_________ ?
Which of the following coil will have large resonant frequency __________?
In an AC. circuit, a low value of kVAR compared with kW indicates_________?
The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is__________?
A pure inductance connected across 250 V, 50 Hz supply consumes 100 W. This consumption can be attributed to_________?
The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of__________?
The ratio of active power to apparent power is known as factor__________?
The apparent power drawn by an A.C. circuit is 10 kVA and active power is 8 kW. The reactive power in the circuit is_________?
A parallel AC. circuit in resonance will__________?
In AC. circuits, laminated iron is invariably used in order to__________?
All definitions of power factor of a series R-L-C circuit are correct except__________?
The purpose of a parallel circuit resonance is to magnify________?
Wire-wound resistors are unsuitable for use at high frequencies because they_______?
Which of the following statements pertains to resistors only __________?
Aphasoris________?
Capacitive susceptance is a measure of__________?
What will be the phase angle between two alternating waves of equal frequency, when one wave attains maximum value the other is at zero value________ ?
In a parallel R-C circuit, the current always________the applied voltage?
Which of the following refers to a parallel circuit ?
In a sine wave the slope is constant_______?
In an A.C. circuit power is dissipated in__________?
Skin effect occurs when a conductor carries current at_______ frequencies
The power is measured in terms of decibles in case of_________?
At _______ frequencies the parallel R-L circuit behaves as purely resistive
At very low frequencies a series R-C circuit behaves as almost purely__________?
The frequency of domestic power supply in Pakistan is_________?
In a three-phase supply floating neutral is undesirable because it way give rise to__________?
The r.m.s. value of half wave rectified sine wave is 200 V. The r.m.s. value of full wave rectified AC. will be__________?
Which of the following waves has the highest value of peak factor __________?
The inductance of a coil can be increased by_________?
The phosphors for which of the following pair are 180° out of phase for VL, VC and VR______?
The r.m.s. value of pure cosine function is_________?
The series and parallel resonance on L-C circuit’ differs in that_________?
The frequency of an alternating current is__________?
Ohm is unit of all of the following except__________?
The equation of 50 Hz current sine wave having r.m.s. value of 60 A is__________?
The power factor of a D.C. circuit is always__________?
In a pure inductive circuit if the supply frequency is reduced to 1/2, the current will__________?
In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will__________?
An A.C. voltage is impressed across a pure resistance of 3.5 ohms in parallel with a pure inductance of impedance of 3.5 ohms?
The product of apparent power and cosine of the phase angle between circuit voltage and current is
A pure capacitor connected across an A.C. voltage consumed 50 W. This is due to________?
When an alternating current passes through an ohmic resistance the electrical power converted into heat is__________?
In each of the three coils of a three phase generator, an alternating voltage having an r.m.s. value of 220 V is induced. Which of the following values is indicated by the voltmeters ______?
The power factor at resonance in R-L- C parallel circuit is________?
In a pure inductive circuit__________?
In the case of an unsymmetrical alternating current the average value must always be taken over__________?
The transient currents are associated with the__________?
In a pure resistive circuit__________?
In a circuit containing R, L and C, power loss can take place in__________?
The r.m.s. value of alternating current is given by steady (D.C.) current which when flowing through a given circuit for a given time produces__________?

In a R-L-C circuit_________?

A. power is consumed in resistance and is equal to I R
B. exchange of power takes place between inductor and supply line
C. exchange of power takes place between capacitor and supply line
D. exchange of power does not take place between resistance and the supply line
E. all above are correct

Correct Answer: all above are correct ✔

Last Updated: December 11, 2018