Speed-torque characteristic of PMDC motors is _______________(a) Starting from zero increasing continuously(b) Starting from some positive value and remaining constant(c) Starting from some positive value and decreasing exponentially(d) Starting from some positive value and decreasing on straight lineThe question was asked in an international level competition.Question is from PMDC Motors topic in division DC Machines of DC Machines

Speed-torque characteristic of PMDC motors is _______________(a) Start

1.	Speed-torque characteristic of PMDC motors is _______________(a) Starting from zero increasing continuously(b) Starting from some positive value and remaining constant(c) Starting from some positive value and decreasing exponentially(d) Starting from some positive value and decreasing on straight lineThe question was asked in an international level competition.Question is from PMDC Motors topic in division DC Machines of DC Machines
Answer» Right option is (d) Starting from some positive value and decreasing on straight LINE The explanation is: The material chosen for PMDC motor is such that SPEED TORQUE CHARACTERISTIC of a given motor remains straight line for WIDER range of torque, for wider range of armature voltage. The straight line is such that it makes positive intercepts on both axes.

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