Electrical Machines What is the increase in the torque expressed as percentage of initial torque, if current drawn by the dc series motor is increased from 10A to 11A? 11% 21% 10% 41% 11% 21% 10% 41% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The ventilating ducts in most of DC machine are radial as well as longitudinal. longitudinal. radial. none of these. radial as well as longitudinal. longitudinal. radial. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 230 volt dc motor has an armature winding resistance of 0.5 ohm. Calculate the emf induced by the motor if the full load armature current is 23 ampere. 220.4 volt. 120 volt. None of these. 218.5 volt. 220.4 volt. 120 volt. None of these. 218.5 volt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 240 V dc series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 Ω. The value of resistance which must be added to obtain rated torque at 1000 rpm is 6 Ω 2.2 Ω 5.7 Ω 1.9 Ω 6 Ω 2.2 Ω 5.7 Ω 1.9 Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If direct axis reactance Xd and quadrature axis reactance Xq are equal, then reluctance power is maximum All of these zero minimum maximum All of these zero minimum ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Skewing of cage rotors offers the following advantages uniform torque. less noise. all of below. locking tendency is reduced. uniform torque. less noise. all of below. locking tendency is reduced. ANSWER DOWNLOAD EXAMIANS APP
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