With increase in armature current, speed of the cumulative compound motor _________(a) Reduces slowly compare to shunt motor(b) Reduces sharply compare to shunt motor(c) Remains constant(d) Increases in proportionality with armature currentThis question was addressed to me during an online exam.My question is from Operating Characteristics of DC Compound Motor in section Characteristics of DC Motors of DC Machines

With increase in armature current, speed of the cumulative compound mo

1.	With increase in armature current, speed of the cumulative compound motor _________(a) Reduces slowly compare to shunt motor(b) Reduces sharply compare to shunt motor(c) Remains constant(d) Increases in proportionality with armature currentThis question was addressed to me during an online exam.My question is from Operating Characteristics of DC Compound Motor in section Characteristics of DC Motors of DC Machines
Answer» Correct answer is (b) Reduces SHARPLY compare to SHUNT MOTOR For explanation: As armature current increases, the back EMF decreases similar to shunt motor. By the same TIME series field resistance carries more armature current producing more amount of flux which is inversely proportional speed.

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