# A 4-pole, 1500 RPM alternator will generate EMF at:

1. 20 Hz
2. 60 Hz
3. 40 Hz
4. 50 Hz

Option 4 : 50 Hz

## Detailed Solution

We know that

$$f = \frac{{PN}}{{120}}$$

Here f = frequency, P = No. of pole, N = speed in RPM

$$f = \frac{{4 \times 1500}}{{120}} = 50\;Hz$$
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EKT ME Full Test 1
2067
50 Questions 150 Marks 45 Mins
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