engineering recuitment DRDO Technician A 2022 Mock Test Series (Tier I) Electrician and Wireman Electrical Machines Polyphase Induction Motors
What is the rotor current frequency when the slip is 3% for a 4 pole 60 Hz 3 phase squirrel cage induction motor?
1
50 Hz
2
3 Hz
3
1.8 Hz
4
1.5 Hz