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• The velocity of the dc machine at the final state is ________(a) E/Bl(b) Bl/E(c) EBl(d) None of the mentionedI had been asked this question in an interview for job.This intriguing question comes from Torque in DC Machines in section Electromechanical Energy Conversions of Electrical Machines
• For a universal motor, the rated supply current is 10A giving a rated torque of 100 N-m. If a current of 5A is applied, what will be generated torque vary to?(a) 250 N-m(b) 400 N-m(c) 500 N-m(d) 1000 N-mThis question was addressed to me in quiz.The doubt is from Torque in DC Machines topic in division Electromechanical Energy Conversions of Electrical Machines
• Pulsating torque frequency in universal motor is ________(a) 2f(b) f(c) f/2(d) 4fI got this question in class test.Origin of the question is Torque in DC Machines in chapter Electromechanical Energy Conversions of Electrical Machines
• DC Motor torque depends on ________(a) geometry(b) magnetic properties(c) any of the mentioned(d) both geometry and magnetic properties of the structureI got this question by my school teacher while I was bunking the class.Origin of the question is Torque in DC Machines in chapter Electromechanical Energy Conversions of Electrical Machines
• If the torque induced is zero in the dc machine, it can be said that ____________(a) current is zero(b) flux can be zero(c) current or flux=0(d) any of the mentionedI had been asked this question in an interview for job.I'm obligated to ask this question of Torque in DC Machines in chapter Electromechanical Energy Conversions of Electrical Machines
• If the torque is in the direction of rotation, the DC machine acts as ________(a) generator(b) motor(c) amplidyne(d) any of the mentionedThis question was addressed to me in quiz.This interesting question is from Torque in DC Machines topic in section Electromechanical Energy Conversions of Electrical Machines
• The cogging torque is absent in the permanent magnet dc machine is due to ________(a) non-magnetic nature of rotor(b) magnetic nature of rotor(c) absence of ac supply(d) any of the mentionedI have been asked this question in an online quiz.The above asked question is from Torque in DC Machines topic in portion Electromechanical Energy Conversions of Electrical Machines
• The simple rotating loop between pole faces connected to a battery and resistor through a switch, the specifications of this machine are radius = 0.5m, length 1m, resistance = 0.3 ohms and magnitude strength = 0.25T is supplied with 120V. What is the steady state angular velocity at no-load?(a) 480 rad/s(b) 960 rad/s(c) 320 rad/s(d) 490 rad/sThe question was posed to me in an internship interview.The query is from Torque in DC Machines in section Electromechanical Energy Conversions of Electrical Machines
• The simple rotating loop between pole faces connected to a battery and resistor through a switch, the specifications of this machine are radius = 0.5m, length 1m, resistance = 0.3 ohms and magnitude strength = 0.25T is supplied with 120V. What will be the magnitude of the following current at t=0+?(a) 400A(b) 200A(c) 0(d) any of the mentionedI have been asked this question at a job interview.The above asked question is from Torque in DC Machines in section Electromechanical Energy Conversions of Electrical Machines
• The simple rotating loop between pole faces connected to a battery and resistor through a switch, the specifications of this machine are radius = 0.5m, length 1m, resistance = 0.3 ohms and magnitude strength = 0.25T is supplied with 120V. Suddenly the switch is closed at t=0, what is observed in the circuit?(a) Current will flow but zero induced EMF(b) Current will not flow and zero induced EMF(c) Current will not flow but EMF is induced(d) Current will flow and EMF will also be inducedThe question was posed to me in an international level competition.This question is from Torque in DC Machines topic in section Electromechanical Energy Conversions of Electrical Machines