Electrical Machines In a DC motor under constant terminal voltage what is the relation between torque (Te) and power (P) T∝ P² T∝ P³ T∝ P T is independent of P T∝ P² T∝ P³ T∝ P T is independent of P ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 500 V, 55 kVA single phase alternator has an effective resistance of 0.5 Ω. An excitation current of 10 A produces 200 A armature current on short circuit and an emf of 450 V on per circuit. The synchronous reactance will be 2.781 Ω. 2.241 Ω. 25.564 Ω. 2.74 Ω. 2.781 Ω. 2.241 Ω. 25.564 Ω. 2.74 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In electric locomotives which of the following motor are used ? DC compound motor. DC Shunt motor. Synchronous motor. DC series motor. DC compound motor. DC Shunt motor. Synchronous motor. DC series motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC series motor the speed is ______________ proportional to the armature current. inversely. none of these. directly. has no relation. inversely. none of these. directly. has no relation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A shunt generator has a critical field resistance of 300 Ω at a speed of 800 rpm if the speed is raised to 1000 rpm the critical field resistance is 145 Ω. 225 Ω. 375 Ω. 150 Ω. 145 Ω. 225 Ω. 375 Ω. 150 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator if field winding attains the critical resistance machine will generate maximum power. the voltage generated will be zero. field winding will burn. machine will generate maximum voltage. machine will generate maximum power. the voltage generated will be zero. field winding will burn. machine will generate maximum voltage. ANSWER DOWNLOAD EXAMIANS APP
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