Electrical Machines which of the following type of brush and their application is/are correct carbon brush → normal ratings electro graphite → large ratings copper graphite → low voltage high current density All of these carbon brush → normal ratings electro graphite → large ratings copper graphite → low voltage high current density All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Induction motors have the advantage of all of below. simple in construction. less maintenance. less cost. all of below. simple in construction. less maintenance. less cost. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If peak value of phase mmf is F max , then peak value of the rotating field caused by three phase is 3Fmax. Fmax. (3/2)Fmax. (1/2)Fmax. 3Fmax. Fmax. (3/2)Fmax. (1/2)Fmax. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When a DC cummulative compound wound motor is loaded Torque increase and speed decrease. Torque decrease and speed increases. Torque and speed both increase. Both torque and speed decrease. Torque increase and speed decrease. Torque decrease and speed increases. Torque and speed both increase. Both torque and speed decrease. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutation in a DC machine may be explained as a process 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. by which electric current in a coil is reversed. in which magnetic field is set up. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generator on no-load, the air gap flux distribution in space is sinusoidal. pulsating. flat topped. triangular. sinusoidal. pulsating. flat topped. triangular. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS