Category: D.C. Generators

A shunt generator running at 1000 r.p.m. has generated e.m.f. as 200 V. If the speed increases to 1200 r.p.m., the generated e.m.f. will be nearly_______________?

Hamad D.C. Generators 11/05/2020

0

A. 150 V
B. 175 V
C. 240 V
D. 290 V

Copper brushes in D.C. machine are used_____________?

Hamad D.C. Generators 06/05/2020

0

A. where low voltage and high currents are involved
B. where high voltage and small cur-rents are involved
C. in both of the above cases
D. in none of the above cases