Electrical Machines The starting resistance of DC motor is generally Low. 1000 ohms. Infinitely large. around 500 ohms. Low. 1000 ohms. Infinitely large. around 500 ohms. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor when started on no load does not accelerate up to full speed but runs at 1/7th of the rated speed. The motor is said to be cogging. plugging. crawling. locking. cogging. plugging. crawling. locking. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The demagnetising component of armature reaction in a DC generator reduces generator emf. reduces inter poles flux density. increases armature speed. results in sparking trouble. reduces generator emf. reduces inter poles flux density. increases armature speed. results in sparking trouble. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the rotor speed, in a synchronous machine, becomes more than the synchronous speed during hunting, the damper bars develop DC motor torque. induction motor torque. synchronous motor torque. induction generator torque. DC motor torque. induction motor torque. synchronous motor torque. induction generator torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For power factor improvement the synchronous motor is to be lightly loaded and over excited heavily loaded and over excited lightly loaded and underecited heavily loaded and underexcited lightly loaded and over excited heavily loaded and over excited lightly loaded and underecited heavily loaded and underexcited ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A transformer has maximum efficiency at 3/4 load. The ratio of iron loss and full load copper loss is 4/3. 16/9. 3/4. 9/16. 4/3. 16/9. 3/4. 9/16. ANSWER DOWNLOAD EXAMIANS APP
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