Electrical Machines The output power of a dc motor is given by EbIa. none of these. EbIa2. EIa. EbIa. none of these. EbIa2. EIa. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the flux of DC motor approaches zero, its speed will between zero and infinity. approach zero. remain unchanged. aprroach infinity. between zero and infinity. approach zero. remain unchanged. aprroach infinity. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Synchronous reactance of an alternator represents All of these armature reactance and leakage reactance a reactance operating at synchronous speed field winding reactance All of these armature reactance and leakage reactance a reactance operating at synchronous speed field winding reactance ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Neglecting all losses, the developed torque (T) of DC separately excited motor, operating under constant terminal voltage is reduced to its output power (P) as T ∝ √P. T ∝ P. T is independent of P. T2 ∝ P3. T ∝ √P. T ∝ P. T is independent of P. T2 ∝ P3. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The sparking at the the brushes, in a DC machines is due to armature reaction. reactance voltage. presence of commutator. high resistance of carbon brushes. armature reaction. reactance voltage. presence of commutator. high resistance of carbon brushes. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motor the 7th harmonic torque may make the motor rotate at (1 / 7)th synchronous speed. This is called crawling. resonance. harmonics. cogging. crawling. resonance. harmonics. cogging. ANSWER DOWNLOAD EXAMIANS APP
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