Electrical Machines The back emf produced in a dc motor depends on P and Z. Z. none of these. P. P and Z. Z. none of these. P. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a 3 - Φ induction motor can be reversed by transposing any two leads from slip rings. transposing any two leads from supply. transposing all the three leads from the supply. disconnecting any one phase. transposing any two leads from slip rings. transposing any two leads from supply. transposing all the three leads from the supply. disconnecting any one phase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a 3 - Φ induction motor is clockwise when it is supplied with 3 - Φ sinusoidal voltage having phase sequence A - B - C. For counterclockwise rotation of motor, the phase sequence of the supply should be B - C - A. A - C - B. C - A - B. B - C - A or C - A - B. B - C - A. A - C - B. C - A - B. B - C - A or C - A - B. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A smaller air gap in a polyphase induction motor helps to reduce the magnetizing current. reduce the chance of cogging. reduce the chance of crawling. increase the starting torque. reduce the magnetizing current. reduce the chance of cogging. reduce the chance of crawling. increase the starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The maximum power developed in cylindrical synchronous machine is occurs at a load angle of 0o. 90o. Greater than 90o. less than 90o. 0o. 90o. Greater than 90o. less than 90o. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hopkinss test in DC motor is conducted at ? Full load. None of these. No load. Low load. Full load. None of these. No load. Low load. ANSWER DOWNLOAD EXAMIANS APP
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