Electrical Machines Which of the following DC generators has rising V-I characteristics? Shunt. Series. None of them. Compound. Shunt. Series. None of them. Compound. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a DC machine having P no of pole pairs, Z no of conductors having length L of resistivity ρ and cross section S are arranged. what is the armature resistance for simple wave-winding ? PZL/4Sa² PZL/4S PZL/ 4Sa PZL/4Sp² PZL/4Sa² PZL/4S PZL/ 4Sa PZL/4Sp² ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Find the reactance voltage when current is changed from -2A to 2A in 4 sec and self inductance is 1H? 1 V 2 V 4 V 0 V 1 V 2 V 4 V 0 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Skewing of cage rotors offers the following advantages less noise. all of below. locking tendency is reduced. uniform torque. less noise. all of below. locking tendency is reduced. uniform torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines φA DC shunt machine generates 250 V on open circuit at 1000 RPM. Armature resistance is 0.5 Ω, field resistance 250 Ω. When running as a motor takes 4 A at 250 V. Calculate the speed when running as a motor taking 40 A at 250 V. Armature reaction weakens the field by 4%. 970 RPM 960 RPM 920 RPM 940 RPM 970 RPM 960 RPM 920 RPM 940 RPM ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a three phase slip-ring induction motor, brushes are connected to DC supply. equalizing coils. external star-connected resistors. 3 - Φ AC supply. DC supply. equalizing coils. external star-connected resistors. 3 - Φ AC supply. ANSWER DOWNLOAD EXAMIANS APP
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