Synchronous Motors
When a unity pf synchronous motor is operated at a leading pf, it results in _______

None of the listed here
More than rated horseppwer output
More than rated rotor current
Less than rated horsepower output

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Synchronous Motors
As the load is applied to a synchronous motor, the motor takes more armature current because

The back e.m.f. decreases causing an increase in motor current
The rotor by shifting its phase backward causes motor to take more current
The increased load has to take more current
The rotor strengthens the rotating field causing more motor current

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