The voltage drop for which of the following types of brush can be expected to be least ?

Related Mcqs:

The bearings used to support the rotor shafts are generally______________?

A. ball bearings B. bush bearings C. magnetic bearmgs D. needle bearings...

Which of the following could be lamina-proximately the thickness of laminations of a D.C. machine ?

A. 0.005 mm B. 0.05 mm C. 0.5 m D. 5 m...

The e.m.f. induced in the armature of a shunt generator is 600 V. The armature resistance is 0.1 ohm. If the armature current is 200 A, the terminal voltage will be_____________?

A. 640 V B. 620 V C. 600 V D. 580 V...

In a D.C. generator the number of mechanical degrees and electrical degrees will be the same when____________?

A. r.p.m. is more than 300 B. r.p.m. is less than 300 C. number of poles is 4 D. number of poles is 2...

The open circuit voltage of a compound generator is 250 V. At full load the terminal voltage____________?

A. will be less than 250 V B. will always be 250 V C. may be greater or less than 250 V D. none of the above...