Consider the following statements:
As a three-phase induction motor is loaded from no-load to rated load.
1. There is an improvement in the power factor.
2. The torque increases almost in proportion to slip.
3. The air-gap flux falls sharply
Which of the above statements are correct?
1
1, 2 and 3
2
1 and 2 only
3
1 and 3 only
4
2 and 3 only