In case the back e.m.f. and the speed of a D.C. motor are doubled, the torque developed by the motor will

Related MCQs

• The ratio of starting torque to full-load torque is least in case of
• If the speed of a D.C. shunt motor is increased, the back e.m.f. of the motor will
• The speed of a motor falls from 1100 r.p.m. at no-load to 1050 r.p.m. at rated load. The speed regulation of the motor is
• For the same H.P. rating and full load speed, following motor has poor starting torque
• Following motor is used where high starting torque and wide speed range control is required.
• Torque developed by a D.C. motor depends upon
• Which of the following load normally needs starting torque more than the rated torque?
• In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to
• The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is
• In case of D.C. shunt motors the speed is dependent on back e.m.f. only because