M

Mr. Dubey • 52.30K Points
Coach 

Q. In a D.C. generator in order to reduce sparking at brushes, the self-induced e.m.f. in the coil is neutralised by all of the following except

(A) interpoles
(B) dummy coils
(C) compensating winding
(D) shifting of axis of brushes
Correct : Option (B)

Share

Discusssion

Login to discuss.

Be the first to start discuss.

Related MCQs

Q. A particular control system yielded a steady state error of 0.20 for unit step input. A unit integrator is cascaded to this system and unit ramp input

Q. The necessary and sufficient condition for the system to be completely state controllable is that therank of the composite matrix QC is

Q. In transistor oscillators, FET and BJT are used. Instability is achieved by:

Q. A major disadvantage of frequency multipliers is that they multiply the noise factor along with frequency.

Q. In overhead traveling cranes

Q. Light duty cranes are generally used in

Q. Battery operated trucks are used in

Q. Effective radiated power of an isotropic radiator can be given as a product of

Q. The diameter of the rotor shaft for an electric motor depends on which of the following ?

Q. For a D.C. machines laboratory following type of D.C. supply will be suitable