DC Shunt Motor has a disadvantage __________(a) Constant speed(b) Less expensive(c) Not suitable for rapidly changing loads(d) Cannot be determinedI had been asked this question in examination.The origin of the question is Operating Characteristics of DC Shunt Motor in section Characteristics of DC Motors of DC Machines

DC Shunt Motor has a disadvantage __________(a) Constant speed(b) Less

1.	DC Shunt Motor has a disadvantage __________(a) Constant speed(b) Less expensive(c) Not suitable for rapidly changing loads(d) Cannot be determinedI had been asked this question in examination.The origin of the question is Operating Characteristics of DC Shunt Motor in section Characteristics of DC Motors of DC Machines
Answer» Right OPTION is (c) Not suitable for rapidly changing loads For explanation: In DC shunt motor, due to shunt CHARACTERISTICS speed variation depends not only upon the controlling RESISTANCE but on the LOAD current also. This double dependence makes it impossible to keep the speed sensibly constant on rapidly changing load, which is in CONTRAST with characteristic.

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