Electrical Machines A DC series motor has which of the following characteristics? Has a poor torque. Has a almost constant speed. Has its field winding consinting of thick wire and less no of turns. Can be started easily without load. Has a poor torque. Has a almost constant speed. Has its field winding consinting of thick wire and less no of turns. Can be started easily without load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The use of double squirrel cage winding on the rotor provides reduced starting torque. higher efficiency. a large starting torque. low noise. reduced starting torque. higher efficiency. a large starting torque. low noise. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The residual magnetism of a self-excited dc generator is lost. To build up its emf again the field winding must be replaced field winding must be excited by low voltage dc supply the field winding connection must be reversed the armature connection must be reversed the field winding must be replaced field winding must be excited by low voltage dc supply the field winding connection must be reversed the armature connection must be reversed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Use of fractional pitch winding make it stiffer. All of these results in reduced leakage reactance. results in reduced axial length of the machine. make it stiffer. All of these results in reduced leakage reactance. results in reduced axial length of the machine. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Find the developed torque DC Series Motor having armature resistance of 0.2 Ω and taking armature current of 60 A is connected to 250 V supply. Considered brush drop of 1 V each. 133.22 N-m 234.76 N-m. cant be determined. 266.20 N-m. 133.22 N-m 234.76 N-m. cant be determined. 266.20 N-m. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following voltage regulator is preferred for providing large values of load current? Transistor series regulator. None of these Transistor shunt regulator. Zener diode shunt regulator. Transistor series regulator. None of these Transistor shunt regulator. Zener diode shunt regulator. ANSWER DOWNLOAD EXAMIANS APP
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