Effect of Harmonics on Performance of Three Phase Induction Motor - MCQs with Answers

Effect of Harmonics on Performance of Three Phase Induction Motor - MCQs with Answers

Q1. The performance of induction motor is effected by the harmonics in the

a. Space variation of impressed voltage
b. Time variation of impressed voltage
c. Space variation of impressed current
d. Time variation of impressed current

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Q2. The tooth or slot harmonics in an induction motor is caused due to

a. Variation of air gap reluctance
b. Leakage flux
c. Non sinusoidal nature of input voltage
d. None of these

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Q3. The air gap flux of induction motor does not contain

a. 2^nd harmonics
b. 3^rd harmonics
c. 5^th harmonics
d. 7^th harmonics

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Q4. A 50 Hz, 3 phase induction motor with 4 pole stator is supplied by mains, which contains a pronounced fifth time harmonic. The speed of the fifth space harmonic will be

a. 100 rpm
b. 300 rpm
c. 600 rpm
d. 7500 rpm

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