Electrical Machines A 220 V DC machine has an armature resistance 1Ω. If the full load current is 20 A, the difference of induced voltage and generator is 20 V. 60 V. 0 V. 40 V. 20 V. 60 V. 0 V. 40 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the armature current of 5 Amp is flowing through the dc motor the torque produced is 47 Nm. Keeping the speed constant if the armature current is increased to 7 amp, calculate the new torque. Assume losses to be constant. 74 Nm. 27.73 Nm . 65.8 Nm. 38.5 Nm. 74 Nm. 27.73 Nm . 65.8 Nm. 38.5 Nm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Generators work on the principle of production of None of these dynamically and statically induced emf. statically induced emf. dynamically induced emf. None of these dynamically and statically induced emf. statically induced emf. dynamically induced emf. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If an additional resistance is connected in series with a DC motor operating at rated speed, the speed of the motor will Remain unaltered. Oscillate around the normal speed. Reduce. Increase. Remain unaltered. Oscillate around the normal speed. Reduce. Increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Fifth harmonic component of the induced voltage in three phase AC generator can be eliminated by using a winding pitch of 6 / 7. 4 / 5. 2 / 3. 5 / 6. 6 / 7. 4 / 5. 2 / 3. 5 / 6. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Saving of copper in auto transformer is increased as compared to two winding transformer, when transformation ratio K approaches to zero. two. unity. infinity. zero. two. unity. infinity. ANSWER DOWNLOAD EXAMIANS APP
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