Electrical Machines To eliminate the 5th harmonic in the induced voltages their respective pitch factor angle should be 18° 36° 30° 72° 18° 36° 30° 72° ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines R1 is the resistance of the primary winding of the transformer. The turn ratio in terms of primary to secondary is K. Then the equivalent resistance of the primary referred to secondary is K²R1 K×R1 R1 /K² R1 /K K²R1 K×R1 R1 /K² R1 /K ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which type of motors are preferred in lifts? DC compound motors. DC series motors. None of these DC shunt motors. DC compound motors. DC series motors. None of these DC shunt motors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines How can the synchronous speed of a 3 - Φ IM be varied? Both (A) and (B). By varying number of poles. By varying supply voltage. By varying the supply frequency. Both (A) and (B). By varying number of poles. By varying supply voltage. By varying the supply frequency. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine current and emf at the terminals are alternating. current and emf in armature are alternating. emf in armature conductors and at the terminals is alternating. current and emf in armature are unidirectional current and emf at the terminals are alternating. current and emf in armature are alternating. emf in armature conductors and at the terminals is alternating. current and emf in armature are unidirectional ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator in case the brushes are moved so as to bring them in magnetic neutral axis, then, there will be demagnetisation. cross-magnetisation. cross-magnetization as well as demagnetization. none of above. demagnetisation. cross-magnetisation. cross-magnetization as well as demagnetization. none of above. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS