When the power factor is __________ the power becomes zero 100 times a second in a 50Hz supply.(a) 0(b) 1(c) 2(d) 3I had been asked this question during a job interview.My query is from Polyphase System in section Polyphase Circuits of Network Theory

When the power factor is __________ the power becomes zero 100 times a

1.	When the power factor is __________ the power becomes zero 100 times a second in a 50Hz supply.(a) 0(b) 1(c) 2(d) 3I had been asked this question during a job interview.My query is from Polyphase System in section Polyphase Circuits of Network Theory
Answer» RIGHT option is (b) 1 The explanation: The power in a single phase CIRCUIT is PULSATING. When the power factor is one, the power becomes zero 100 times a second in a 50Hz supply. THEREFORE single phase motors have a pulsating TORQUE.

Discussion

No Comment Found

Related InterviewSolutions

A single wattmeter is connected to measure the reactive power of a three-phase, three-wire balanced load. The line current is 17A and the line voltage is 440V. Calculate the power factor of the load if the reading of the wattmeter is 4488 VAR.(a) 0.6(b) 0.8(c) 1(d) 1.2The question was posed to me in an online quiz.I'm obligated to ask this question of Power Measurement in Three-Phase Circuits in chapter Polyphase Circuits of Network Theory
The total reactive power in the load while measuring the reactive power with wattmeter is?(a) √3VLILcosØ(b) √3VLILtanØ(c) √3VLILsinØ(d) √3 VLILsecØThe question was posed to me in final exam.Question is taken from Power Measurement in Three-Phase Circuits topic in portion Polyphase Circuits of Network Theory
The wattmeter reading while measuring the reactive power with wattmeter is?(a) VLILsecØ(b) VLILsinØ(c) VLILtanØ(d) VLILcosØThe question was posed to me in an online interview.Query is from Power Measurement in Three-Phase Circuits in chapter Polyphase Circuits of Network Theory
The readings of the two watt meters used to measure power in a capacitive load are -3000W and 8000W respectively. Find the power factor.(a) 0.25(b) 0.5(c) 0.75(d) 1I had been asked this question in semester exam.The above asked question is from Power Measurement in Three-Phase Circuits topic in section Polyphase Circuits of Network Theory
The readings of the two watt meters used to measure power in a capacitive load are -3000W and 8000W respectively. Calculate the input power. Assume RYB sequence.(a) 5(b) 50(c) 500(d) 5000I have been asked this question in a national level competition.My doubt is from Power Measurement in Three-Phase Circuits in division Polyphase Circuits of Network Theory
The input power to a three-phase load is 10kW at 0.8 Pf. Two watt meters are connected to measure the power. Find the reading of lower reading wattmeter.(a) 1.835(b) 2.835(c) 3.835(d) 4.835This question was addressed to me in class test.Question is taken from Power Measurement in Three-Phase Circuits in chapter Polyphase Circuits of Network Theory
The input power to a three-phase load is 10kW at 0.8 Pf. Two watt meters are connected to measure the power. Find the reading of higher reading wattmeter.(a) 7.165(b) 6.165(c) 6.165(d) 4.165I got this question in semester exam.Enquiry is from Power Measurement in Three-Phase Circuits in chapter Polyphase Circuits of Network Theory
The wattmeter method is used to measure power in a three-phase load. The wattmeter readings are 400W and -35W. Find the reactive power.(a) 751.44(b) 752.44(c) 753.44(d) 754.44This question was addressed to me by my college professor while I was bunking the class.This intriguing question originated from Power Measurement in Three-Phase Circuits topic in portion Polyphase Circuits of Network Theory
The wattmeter method is used to measure power in a three-phase load. The wattmeter readings are 400W and -35W. Find the power factor.(a) 0.43(b) 0.53(c) 0.63(d) 0.73This question was addressed to me at a job interview.I'd like to ask this question from Power Measurement in Three-Phase Circuits topic in division Polyphase Circuits of Network Theory
The wattmeter method is used to measure power in a three-phase load. The wattmeter readings are 400W and -35W. Calculate the total active power.(a) 360(b) 365(c) 370(d) 375I have been asked this question in quiz.Query is from Power Measurement in Three-Phase Circuits in portion Polyphase Circuits of Network Theory

When the power factor is __________ the power becomes zero 100 times a second in a 50Hz supply.(a) 0(b) 1(c) 2(d) 3I had been asked this question during a job interview.My query is from Polyphase System in section Polyphase Circuits of Network Theory

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment