Question

dc generator develops an emf of 200V when driven at 900 rpm with a flux per pole 0f

0.04Wb. It is desired that this emf be increased to 250 V at 1000 rpm. What should be the value

of flux per pole under new circumstances.​

Answer 1

Answer:

It is given that two circle having radii 5.5 cm and 4.2 cm touch each other externally. We know, the distance between the centres of the circles touching externally is equal to the sum of their radii. Thus, the distance between their centres is 9.7 cm.