In each of the three coils of a three phase generator, an alternating voltage having an r.m.s. value of 220 V is induced. Which of the following values is indicated by the voltmeters ______?

A. both will reach their minimum values at the same instant
B. both will reach their maximum values at the same instant
C. when one wave reaches its maxi¬mum value, the other will reach its minimum value
D. none of the above

A. capacitance is less and frequency of supply is less
B. capacitance is less and frequency of supply is more
C. capacitance is more and frequency of supply is less
D. capacitance is more and frequency of supply is more

A. 12 kW
B. 22 kW
C. 32 kW
D. 64 kW

A. increasing core length
B. decreasing the number of turns
C. decreasing the diameter of the former
D. choosing core material having high relative permeability

A. both waves must have same frequency
B. both waves must have identical peak values
C. both waves must have zero value at the same time
D. none of the above

A. is unaffected by the supply frequency
B. decreases with the increase in supply frequency
C. increases with the increase in supply frequency
D. becomes zero with the increase in supply frequency