Electrical braking of any variety becomes less effective as ________________(a) Speed increases(b) Speed decreases(c) Independent of speed(d) Depends on supply voltageThe question was asked by my college professor while I was bunking the class.Query is from Braking of DC Motors topic in portion DC Motors of DC Machines

Electrical braking of any variety becomes less effective as __________

1.	Electrical braking of any variety becomes less effective as ________________(a) Speed increases(b) Speed decreases(c) Independent of speed(d) Depends on supply voltageThe question was asked by my college professor while I was bunking the class.Query is from Braking of DC Motors topic in portion DC Motors of DC Machines
Answer» Right choice is (b) Speed decreases The BEST explanation: Braking torque of the DC machine is given by n (ka2/Rb). Here, braking torque is directly proportional to the speed of the motor, so as the speed decreases the efficiency of ELECTRICAL brakes which is DEPENDENT on braking torque decreases.

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