A rectangular coil 30cm long and 20cm wide has 250 turns. It rotates at the uniform rate of 3000 rev/minute about an axis parallel to its long side and at right angles to a uniform magnetic field of flux density 5×10-2T find the frequency of revolution A60Hz B3000Hz C100Hz D50Hz?

Answer 1

To find the frequency of revolution, we need to convert from revolutions per minute to hertz.

1 revolution = 1/60 minutes

So, the frequency in hertz can be calculated as follows:

Frequency = (3000 revolutions/minute) * (1/60 minutes/second) = 50 Hz

Therefore, the correct answer is option D: 50Hz.