A properly shunted centre-zero galvanometer is connected in the rotor circuit of a 6-pole, 50 Hz wound rotor induction motor. If the galvanometer makes 90 complete oscillations in one minute, the speed of the rotor would be:

In a three-phase alternator, the factor that accounts for the reduction in induced EMF because the coils within a phase group are spread across several slots per pole is known as the ________.

Which factor is least significant in determining the rating of a distribution transformer?