For which types of D.C. motor, dynamic braking is generally used ?

Related Mcqs:

A D.C. series motor is that which______________?

A. has its field winding consisting of thick wire and less turns B. has a poor torque C. can be started easily without load D. has almost constant speed...

In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to

A. 100% of the previous value B. 50% of the previous value C. 25% of the previous value D. 10% of the previous value E. none of the above...

The armature torque of the D.C. shunt motor is proportional to____________?

A. field flux only B. armature current only C. both A. and B. D. none of the above...

Which of the following motors one will choose to drive the rotary compressor ?

A. D.C. shunt motor B. D.C. series motor C. Universal motor D. Synchronous motor...

The purpose of retardation test on D.C. shunt machines is to find out____________?

A. stray losses B. eddy current losses C. field copper losses D. windage losses...