Electrical Machines Two identical loss less series motors connected in series across a dc supply voltage, runs at speed of N1 and N2, then ratio of their output power is none. N12 : N22. 1 : 1. N1 : N2. none. N12 : N22. 1 : 1. N1 : N2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines As compared to DOL starting, a cage induction motor with star-delta starting shall have reduced starting current. smoother acceleration. more starting torque. more starting time. reduced starting current. smoother acceleration. more starting torque. more starting time. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Unbalanced supply voltage given to a 3 - φ, delta connected induction motor will cause all of these. negative sequence current. less heating of the rotor. less heating of the rotor. all of these. negative sequence current. less heating of the rotor. less heating of the rotor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous motor will deliver maximum power when load angle is 0°. load angle is 45°. input power factor is unity. load angle is equal to internal angle θ. load angle is 0°. load angle is 45°. input power factor is unity. load angle is equal to internal angle θ. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power flow of a dc motor, with respect to a DC generator is increased. modified. reversed. none of these. increased. modified. reversed. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutation in a DC machine may be explained as a process by which electric current in a coil is reversed. in which magnetic field is set up. by virtue of which emf is induced in the armature conductors. how alternate flux affects the main field flux. by which electric current in a coil is reversed. in which magnetic field is set up. by virtue of which emf is induced in the armature conductors. how alternate flux affects the main field flux. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS