Electrical Machines The condition for maximum running torque is R = S.X 0.5 lagging 0.707 lagging zero unity R = S.X 0.5 lagging 0.707 lagging zero unity ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole dc generator is running at 1500 rpm the frequency of current in the armature winding is 50Hz. 200Hz. 150Hz. 100Hz. 50Hz. 200Hz. 150Hz. 100Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The commutator segments of DC machines are made up of hard-drawn copper copper alloy copper brass hard-drawn copper copper alloy copper brass ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the mechanical power developed by a DC series motor is maximum? Back emf is equal to half the applied voltage. Back emf is equal to applied voltage. Back emf is equal to zero. None of above. Back emf is equal to half the applied voltage. Back emf is equal to applied voltage. Back emf is equal to zero. None of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a three phase slip-ring induction motor, brushes are connected to DC supply. external star-connected resistors. 3 - Φ AC supply. equalizing coils. DC supply. external star-connected resistors. 3 - Φ AC supply. equalizing coils. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a 3 - Φ, 4 pole, 50 Hz IM rotating at full load speed of 1440 rpm, calculate speed of rotor field with respect to rotor structure and stator structure respectively? 60, 1440. 50, 1500. 1440, 1500. 60, 1500. 60, 1440. 50, 1500. 1440, 1500. 60, 1500. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS