Q.16 How can eddy current loss be minimised in Transformer?Ans A. By using steel coreB. By using iron coreC. By using laminated iron coreD. By using air coreCorrect Ans Provided: C
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Q.50 The maximum efficiency of a single-phase transformer for a constant load current occurs at:Ans A. 0.6 leading power factorB. 0.6 lagging power factorC. 0.8 lagging power factorD. unity power factorCorrect Ans Provided: D
Q.41 At low temperature, a semiconductor virtually behaves like ______.Ans A. an insulatorB. a super conductorC. a conductorD. a magnetCorrect Ans Provided: A
Q.13 Which type of materials is very useful in electrical engineering for the transmission and distribution of electrical energy?Ans A. Low resistivity or high conductivityB. High resistivity or low conductivityC. High resistivity or high conductivityD. Low resistivity or ...
Q.89 Which type of error is produced by induction type of watt meter when it does NOT read correctly at all power factors?Ans A. Frictional errorB. Speed errorC. CreepingD. Phasor errorCorrect Ans Provided: D
Q.4 A और B किसी कार्य को 6 दिनों में कर सकते हैं, जबकि B और C उसी कार्य को 9 दिनों में कर सकते हैं। यह ज्ञात है कि B, C से दोगुना कुशल है। A, B ...
Q.69 What energy is produced by a 9 V battery that moves the charge 15 coulombs around the circuit?Ans A. 25.6 jouleB. 270 jouleC. 135 jouleD. 1.4 jouleCorrect Ans Provided: C
Q.29 An 11000/110 V, 50 Hz, single-phase transformer has an exciting current of 0.8 A and a core loss of 440 watts when its h. v. side is energized at rated voltage. The core loss component of the ...
Q.15 Transformer at no-load behaves like:Ans A. a capacitive reactorB. an inductive reactorC. bank of capacitorD. a resistorCorrect Ans Provided: B
Q.32 In silicon, how many electrons exist in the energy gap?Ans A. FourB. EightC. ZeroD. TwoCorrect Ans Provided: C
