synchronous motor is not inherently self starting. R: At standstill the rotor of a synchronous motor is subjected to alternate forces of repulsion and attraction. 2.A: The squirrel cage induction motor has semi-closed or totally closed type slots on its rotor. R: There is little difficulty in inserting the rotor bars in semi-closed or totally
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Note: Each of the following questions consists of two statements, one labelled Assertion (A) and the other labelled the Reason (R). Examine the two statements carefully and decide if the Assertion (A) and Reason (R) are individually true and if so whether the Reason (R) is correct explanation of the Assertion (A). Select your answers to these questions using the codes given below:
A. Both A and R are true and R is a correct explanation of A.
B. Both A and R are true but R is not a correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
1. A: A synchronous motor is not inherently self starting.
R: At standstill the rotor of a synchronous motor is subjected to alternate forces of repulsion and attraction.
2.A: The squirrel cage induction motor has semi-closed or totally closed type slots on its rotor.
R: There is little difficulty in inserting the rotor bars in semi-closed or totally closed slots and such slots reduce
magnetizing current and teeth loss.
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