railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Electrical Machines Three Phase Induction Motor Induction Motor Rotor Frequency
A three-phase 20 HP. 208 V, 60 Hz, 6 - pole, star - connected induction motor delivers 15 kW at 5% slip. Calculate the frequency of the rotor current.
1
30 Hz
2
18 Hz
3
6 Hz
4
3 Hz