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?
To find the frequency of revolution, we need to convert the given rate of rotation in revolutions per minute into Hertz.
1 revolution/minute = 1/60 Hz
Therefore, 3000 revolutions/minute = 3000/60 Hz = 50 Hz
So, the frequency of revolution is D50Hz.
To find the frequency of revolution, we need to use the formula:
Frequency (f) = (Number of rotations per minute) / 60
In this case, the number of rotations per minute is given as 3000 rev/minute.
Now, let's calculate the frequency:
f = 3000 rev/minute / 60 = 50 Hz
Therefore, the correct answer is D. 50Hz.