Electrical Machines A commutator with a diameter of 50 cm rotating at 1000 rpm. For a brush width of 1.5 cm, find the time of commutation in ms. 0.443. 0.512. 0.649. 0.573. 0.443. 0.512. 0.649. 0.573. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC motors, under trailing pole tips, flux density will_______ ? either increase or decrease increase decrease None of these either increase or decrease increase decrease None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine current and emf at the terminals are alternating. emf in armature conductors and at the terminals is alternating. current and emf in armature are alternating. current and emf in armature are unidirectional current and emf at the terminals are alternating. emf in armature conductors and at the terminals is alternating. current and emf in armature are 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
Electrical Machines Exciting current of an induction motor is lesser than power transformer. none of these. higher than power transformer. equal as power transformer. lesser than power transformer. none of these. higher than power transformer. equal as power transformer. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ slip ring motor has short-circuited rotor. wound rotor. double cage rotor. any of the above. short-circuited rotor. wound rotor. double cage rotor. any of the above. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS