Heating effect in the Wheatstone bridge can be avoided by _________(a) using an expensive emf source(b) limiting current to a safe value(c) using heating sinks(d) immersing the setup in iceThe question was asked in semester exam.This intriguing question comes from Measurement Errors in a Wheatstone Bridge in section Measurement of Resistance of Electrical Measurements

Heating effect in the Wheatstone bridge can be avoided by _________(a)

1.	Heating effect in the Wheatstone bridge can be avoided by _________(a) using an expensive emf source(b) limiting current to a safe value(c) using heating sinks(d) immersing the setup in iceThe question was asked in semester exam.This intriguing question comes from Measurement Errors in a Wheatstone Bridge in section Measurement of Resistance of Electrical Measurements
Answer» Right option is (b) limiting CURRENT to a safe VALUE For explanation I WOULD say: Heating EFFECT can be eliminated by limiting the current through the circuit to a safe value and by calculating the power dissipation in the arms. Heat SINKS are typically used in power electronic applications.

Discussion

No Comment Found

Related InterviewSolutions

The simultaneous applications of signals x (t) and y (t) to the horizontal and vertical plates respectively, of an oscilloscope, produce a vertical figure of 8 displays. If P and Q are constants and x(t) = P sin (4t + 30), then y(t) is equal to _________(a) Q sin (4t -30)(b) Q sin (2t +15)(c) Q sin (8t +60)(d) Q sin (4t +30)The question was posed to me in an online quiz.The origin of the question is Advanced Miscellaneous Problems on Measurement of Resistance in chapter Measurement of Resistance of Electrical Measurements
A galvanometer with a full-scale current of 10 mA has a resistance of 1000 Ω. The multiplying power of a 100 Ω shunt with this galvanometer is?(a) 110(b) 100(c) 11(d) 10The question was asked during an interview for a job.Query is from Advanced Miscellaneous Problems on Measurement of Resistance in division Measurement of Resistance of Electrical Measurements
Resistance is measured by the voltmeter-ammeter method employing DC excitation and a voltmeter is connected directly across the unknown resistance. If the voltmeter and ammeter readings are subject to maximum possible errors of ±2.4 % and ±1% respectively, then the magnitude of the maximum possible percentage error in the value of resistance deduced from the measurement is?(a) 1.4 %(b) 1.7 %(c) 2.4 %(d) 3.4 %The question was asked during an internship interview.I'm obligated to ask this question of Advanced Miscellaneous Problems on Measurement of Resistance topic in section Measurement of Resistance of Electrical Measurements
A 100 μA ammeter has an internal resistance of 100 Ω. The range is to be extended to 500 μA. The shunt required is of resistance __________(a) 20.0 Ω(b) 22.22 Ω(c) 25.0 Ω(d) 50.0 ΩThe question was posed to me by my college director while I was bunking the class.My question is from Advanced Miscellaneous Problems on Measurement of Resistance in portion Measurement of Resistance of Electrical Measurements
A DC ammeter has a resistance of 0.1 Ω and its current range is 0-100 A. If the range is to be extended to 0-500 A, the meter requires which of the following shunt resistance?(a) 0.010 Ω(b) 0.011 Ω(c) 0.025 Ω(d) 1.0 ΩI have been asked this question during a job interview.The query is from Advanced Miscellaneous Problems on Measurement of Resistance in section Measurement of Resistance of Electrical Measurements
ADC ammeter is rated for 15 A, 250 V. The meter constant is 14.4 A-s/rev. The meter constant at rated voltage may be expressed as __________(a) 3750 rev/kW-h(b) 3600 rev/kW-h(c) 1000 rev/kW-h(d) 960 rev/kW-hThe question was posed to me in a national level competition.This is a very interesting question from Advanced Miscellaneous Problems on Measurement of Resistance in chapter Measurement of Resistance of Electrical Measurements
A 35 V DC supply is connected across a resistance in series with an unknown resistance R. a voltmeter having a resistance of 1.2 kΩ is connected across 600 Ω resistance and reads 5 V. The value of the known resistance is 600 Ω. The value of resistance R will be?(a) 120 Ω(b) 400 Ω(c) 1.8 kΩ(d) 2.4 kΩThis question was addressed to me in final exam.Question is from Advanced Miscellaneous Problems on Measurement of Resistance topic in section Measurement of Resistance of Electrical Measurements
A setup is used to measure resistance R. The ammeter and voltmeter resistance are 0.01 Ω and 2000 Ω respectively. Their readings are 2 A and 180 V respectively, giving a measured resistance of 90 Ω. The percentage error in the measurement is?(a) 2.25 %(b) 2.35 %(c) 4.5 %(d) 4.71 %This question was posed to me in quiz.Asked question is from Advanced Miscellaneous Problems on Measurement of Resistance in division Measurement of Resistance of Electrical Measurements
A 500 A, 50 Hz current transformer has a bar primary. The secondary burden is a pure resistance of 1 Ω and it draws a current of 5 A. If the magnetic core requires 250 Ampere-turn for magnetization, the percentage ratio error is __________(a) 10.56%(b) -10.56%(c) 11.80%(d) -11.80%I got this question in examination.This is a very interesting question from Advanced Problems on Error Analysis in Electrical Instruments topic in section Measurement of Resistance of Electrical Measurements
Ra and Rd are the opposite arms of a Wheatstone bridge as are Rc and Rb. The source voltage is applied across Ra and Rc. Then when the bridge is balanced which one of the following is true?(a) Ra = Rc Rd/Rb(b) Ra = Rb Rc/Rd(c) Ra = Rb Rd/Rc(d) Ra = Rb + Rc + RdThis question was addressed to me in an online quiz.My question is based upon Advanced Miscellaneous Problems on Measurement of Resistance in section Measurement of Resistance of Electrical Measurements

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment