Electrical Machines A 4 pole dc generator is running at 1500 rpm the frequency of current in the armature winding is 100Hz. 150Hz. 200Hz. 50Hz. 100Hz. 150Hz. 200Hz. 50Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum power will be developed when back emf is equal to supply voltage. All of these double the supply voltage. half of the supply voltage. equal to supply voltage. All of these double the supply voltage. half of the supply voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC Shunt Motor having shunt field resistance of 250 Ω and armature resistance of 0.5 Ω is connected to 250 V supply and load current of 21 A. What is the back emf generated ? 210 V 230 V. 240 V. 150 V. 210 V 230 V. 240 V. 150 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines which of the following losses are negligible in blocked rotor test? both A and B mechanical loss iron loss copper loss both A and B mechanical loss iron loss copper loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In escalator which motor is used? 3 - φ IM. DC shunt motor. 1 - φ IM. Universal motor. 3 - φ IM. DC shunt motor. 1 - φ IM. Universal motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In circle diagram for induction motor, diameter of circle represents which of the following ? Line voltage. Rotor current. Running torque. Slip. Line voltage. Rotor current. Running torque. Slip. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS