Electrical Machines The use of higher flux density in the transformer design increases the weigh per KVA reduces the weigh per KVA has no relation with the weight of transformer None of these increases the weigh per KVA reduces the weigh per KVA has no relation with the weight of transformer None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If any two leads from slip rings are interchanged in a 3 - Φ induction motor, the motor will run in a direction opposite to previous one. get damaged. not run. continue running in the same direction as before. run in a direction opposite to previous one. get damaged. not run. continue running in the same direction as before. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The starting resistance of DC motor is generally Infinitely large. around 500 ohms. 1000 ohms. Low. Infinitely large. around 500 ohms. 1000 ohms. Low. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a seperately excited DC Motor if field current is increased, it will Reduce armature heating. Increase speed Increase acceleration duration. Reduce starting torque. Reduce armature heating. Increase speed Increase acceleration duration. Reduce starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC motor with armature resistance of 0.5 ohms is connected directly to a 230 Volt supply. If the armature is stationary then the current flowing through armature is 460 A. 570 A. 340 A. 250 A. 460 A. 570 A. 340 A. 250 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the frequency of input voltage of a transformer is increased keeping the magnitude of voltage unchanged, then Ph will increase but Pe will decrease Pe will increase but Ph will decrease Ph will decrease but Pe will remain same both hysteresis loss(Ph) and eddy current loss(Pe) will increase Ph will increase but Pe will decrease Pe will increase but Ph will decrease Ph will decrease but Pe will remain same both hysteresis loss(Ph) and eddy current loss(Pe) will increase ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS