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A 4-pole induction motor, supplied by a slightly unbalanced three-phase 50 Hz source, is rotating at 1440 rpm. The electrical frequency in Hz of the induced negative sequence current in the rotor is
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- 100
- 98
- 52
- 48
Correct Option: B
| S = | = 0.04 | |
| 1500 |
Frequency of +ve seq. current in rotor
| = |  |  | × 50 = 0.04 × 50 | |
| 1500 |
Frequency of – ve current in rotor
| = | | | × 50 = 98 Hz | |
| 1500 |
