Electrical Machines When a DC cummulative compound wound motor is loaded Both torque and speed decrease. Torque decrease and speed increases. Torque and speed both increase. Torque increase and speed decrease. Both torque and speed decrease. Torque decrease and speed increases. Torque and speed both increase. Torque increase and speed decrease. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What happens if fifth multiples of harmonics is given to induction motor? Fail to start. It will rotates in reverse direction. It will rotates in normal operation. Either short circuit or open circuit occurs. Fail to start. It will rotates in reverse direction. It will rotates in normal operation. Either short circuit or open circuit occurs. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature of DC machine is made of non-ferrous material. conducting material. insulating material. silicon steel. non-ferrous material. conducting material. insulating material. silicon steel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc motors, under leading pole tips flux density will--------? increase decrease None of these either increase or decrease increase decrease None of these either increase or decrease ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The air gap between the yoke and armature is dc machine is kept very small to avoid over heating. All of these to avoid locking of the armature. to achieve a stronger magnetic field. to avoid over heating. All of these to avoid locking of the armature. to achieve a stronger magnetic field. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Dynamic braking is very effective for shunt motors. series motors. differential compound motors. separately excited motors. shunt motors. series motors. differential compound motors. separately excited motors. ANSWER DOWNLOAD EXAMIANS APP
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