Electrical Machines Slip rings of an induction motors are made of carbon. phosphor bronze. aluminium. stainless steel. carbon. phosphor bronze. aluminium. stainless steel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Autotransformer makes effective saving on copper and copper losses, when its transformation ratio is equal to very low greater than one. less than one. approx to one. very low greater than one. less than one. approx to one. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous machine, if φ is the flux per pole and f is the frequency of the emf induced E then E ∝ 1/(φf) E ∝ φ/f E ∝ f/φ E ∝ φf E ∝ 1/(φf) E ∝ φ/f E ∝ f/φ E ∝ φf ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slip exists in synchronous motor. in both machines. induction motor. none of above. synchronous motor. in both machines. induction motor. none of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole wave wound dc motor having flux per pole of 9.56 X 10-3 Wb contains 460 armature conductors. Calculate the back emf produced when it is running at a speed of 1500 rpm. 220 volt. 230 volt. 240 volt. 440 volt. 220 volt. 230 volt. 240 volt. 440 volt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In shunt dc motor the direction of rotation of the motor will reversed. When none of above. only armature terminals are reversed. either field terminals are reversed or armature terminals are reversed. only field terminals are changed. none of above. only armature terminals are reversed. either field terminals are reversed or armature terminals are reversed. only field terminals are changed. ANSWER DOWNLOAD EXAMIANS APP
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