Electrical Machines In circle diagram for induction motor, diameter of circle represents which of the following ? Slip. Rotor current. Running torque. Line voltage. Slip. Rotor current. Running torque. Line voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The emf induced in the dc generator armature winding is AC and DC AC None of these DC AC and DC AC None of these DC ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine current and emf in armature are unidirectional current and emf at the terminals are alternating. current and emf in armature are alternating. emf in armature conductors and at the terminals is alternating. current and emf in armature are unidirectional current and emf at the terminals are alternating. current and emf in armature are alternating. emf in armature conductors and at the terminals is alternating. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor drawing an armature current of Ia is operating under saturated magnetic conditions. The torque developed in the motor is proportional to Ia 1/Ia I/Ia2 Ia2 Ia 1/Ia I/Ia2 Ia2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The counter (or back) emf in a dc machine is 1. the same as generated emf in a dc motor 2. proportional to field flux and armature speed 3. not the same as generated emf in a dc motor 4.inversely proportional to field flux 5. proportional to number of armature conductors 6. constant from no load to full load From these, the correct answer is 2, 3, 6 3, 4, 5 2, 4, 5, 6 1, 2, 5 2, 3, 6 3, 4, 5 2, 4, 5, 6 1, 2, 5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If residual magnetism of a shunt generator is destroyed accidentally it may be restored by connecting its shunt field in reverse. to earth. to an AC source. to a DC source. in reverse. to earth. to an AC source. to a DC source. ANSWER DOWNLOAD EXAMIANS APP
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