Electrical Machines A separately excited DC motor has an armature resistance of 0.5 Ohm. The supply voltage is 250V. Armature current is 20A and the speed of rotation is 1500 rpm. Find the torque developed? 15.6 Nm 15.28 Nm 16.55 Nm Zero 15.6 Nm 15.28 Nm 16.55 Nm Zero ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines With the increase in speed of DC motor Back emf increase but line current falls. Back emf falls and line current increase. Both back emf as well as line current fall. Both back emf as well as line current increase. Back emf increase but line current falls. Back emf falls and line current increase. Both back emf as well as line current fall. Both back emf as well as line current increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generator, lap winding is used in high current and low voltage applications. where greater load is connected. high voltage and low current applications. where constant speed is required. high current and low voltage applications. where greater load is connected. high voltage and low current applications. where constant speed is required. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Unbalance 3 - Φ stator currents cause All of these heating of rotor. vibrations. double frequency currents in the rotor. All of these heating of rotor. vibrations. double frequency currents in the rotor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC series motor the speed is ______________ proportional to the armature current. none of these. inversely. directly. has no relation. none of these. inversely. directly. has no relation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Field divertor method of speed control of a DC series motor gives speed above rated one due to reduction of Field current. Armature current. Line current. None of above. Field current. Armature current. Line current. None of above. ANSWER DOWNLOAD EXAMIANS APP
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