Q.80 The EMF is induced only when there is ____.Ans 1. either magnetic flux linking with the coil changes or moving conductor links with the magnetic flux2. magnetic flux links with coil changes3. stationary conductor links with the ...
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Q.77 Superposition theorem is applicable for the calculation of:Ans 1. voltage and current but not power2. voltage, current and power3. both current and power4. both voltage and powerCorrect Ans: 1
Q.75 In dynamically induced EMF, the stationary part and rotating part are _____________, respectively.Ans 1. magnetic field and conductor2. conductor and magnetic field3. brush and commutator4. commutator and brushCorrect Ans: 1
Q.79 If there is no same voltage ratio while conducting parallel operation of three-phase transformers, then it produces _________.Ans 1. magnetic hysteresis2. leakage flux and hysteresis3. leakage flux4. circulating currentCorrect Ans: 4
Q.82 The constant load current for a 230 V single phase energy metre is 20 A at unity power factor. If the meter disc makes 2300 revolutions for 2 hours the meter constant will be ______.Ans 1. 250 ...
Q.76 The annual load duration curve is a straight line from 20 MW to 6 MW. Find the load factor.Ans 1.2.3.4.Correct Ans: ...
Q.72 The formula for rms value of sinusoidal signal in terms of peak to peak voltage, Vp-p is __________.Ans 1.2.3.4.Correct Ans: ...
Q.78 Solar PV cells produce ________.Ans 1. eddy current2. direct current3. alternative current4. no currentCorrect Ans: 2
Q.83Ans 1. 14V2. 26V3. 40V4. 10VCorrect Ans: 2
Q.65Ans 1. 60 V2. 84 V3. 71.42 V4. 40 VCorrect Ans: 1
