A. actual power is zero
B. reactive power is zero
C. apparent power is zero
D. none of above is zero
Correct Answer: actual power is zero ✔
Last Updated: December 11, 2018
Related MCQs
- Time constant of an inductive circuit_________?
- Magnitude of current at resonance in R-L-C circuit________?
- In R-L-C series resonant circuit magnitude of resonance frequency can be changed by changing the value of__________?
- The time constant of a series R-C circuit is given by__________?
- Pure inductive circuit takes power from the A.C. line when_________?
- Which of the following circuit component opposes the change in the circuit voltage ?
- Power factor of electric bulb is__________?
- Time constant of a circuit is the time in seconds taken after the application of voltage to each__________?
- The safest value of current the human body can carry for more than 3 second is_________?
- If resistance is 20 Q. and inductance is 27 in a R-L series circuit, then time constant of this circuit will be________?
- In a R-L-C circuit_________?
- 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?