railway DFCCIL Executive 2025 Mock Test Electrical Machines Three Phase Induction Motor Induction Motor Rotor Frequency
A 3 - phase, 20 HP, 208 V, 60 Hz, 6 - pole star connected induction motor delivers 15 kW at a slip of 5%. Find the frequency of the rotor current.
1
12 Hz
2
5 Hz
3
3 Hz
4
9 Hz