Electric Drives Questions and Answers
Q1.
The unit of Magento-motive force is Ampere-turns.
Answer :
True
Q2.
The unit of active power is Watt.
Answer :
True
Q3.
The ferrite cores are used for _______ transformers.
Answer :
Small transformers
Q4.
A higher value of armature reaction means the lower value of the short circuit ratio.
Answer :
True
Q5.
Armature reaction is cross-magnetizing in nature due to a resistive load in the synchronous generator.
Answer :
True
Q6.
In the rotor voltage injection method, when an external voltage source is in phase with the main voltage then speed will ____
Answer :
Increase
Q7.
The no-load circuit test on a 3-Φ induction motor is conducted at a rotor speed of ______
Answer :
Ns
Q8.
Armature reaction is demagnetizing in nature due to a purely capacitive load in the synchronous generator.
Answer :
False
Q9.
The value of impulse at t=0 is ______
Answer :
infinite
Q10.
The nodal method is better than mesh analysis for solving circuit problems.
Answer :
True
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