Electrical Machines Which of the following represents the rotating losses of machine? Hysteresis losses Eddy current losses All of the them Friction and windage losses Hysteresis losses Eddy current losses All of the them Friction and windage losses ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements regarding the magnetization characteristics of a dc generator : 1. It represents the variation of field flux with field current. 2. Variation of open-circuit terminal voltage with field current is independent of speed 3. It is non-linear from zero to rated field current 4. It helps to determine the critical field resistance at a given speed 5. It always starts from the origin Which of these statements are correct ? 1 and 4 3 and 5 1, 2 and 5 2, 3 and 4 1 and 4 3 and 5 1, 2 and 5 2, 3 and 4 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Inter pole winding is connected in-------------------------- ? parallel with main poles series with main poles parallel with armature series with armature parallel with main poles series with main poles parallel with armature series with armature ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a given torque, reducing divertor resistance of a DC series motor Increase in speed demanding more armature current. Decrease in speed demanding less armature current. Decrease in speed but armature current remains the same. Increase in speed but armature currnet remains the same. Increase in speed demanding more armature current. Decrease in speed demanding less armature current. Decrease in speed but armature current remains the same. Increase in speed but armature currnet remains the same. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, the space distribution of air-gap flux density wave at no load is flat-topped co- sinusoidal rectangular sinusoidal flat-topped co- sinusoidal rectangular sinusoidal ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC shunt generator working on load, the brushes are moved forward in the direction of rotation, as a result of this, commutation will worsen and terminal voltage will rise. worsen and terminal voltage will fall improve and terminal voltage will rise . improve but terminal voltage will fall. worsen and terminal voltage will rise. worsen and terminal voltage will fall improve and terminal voltage will rise . improve but terminal voltage will fall. ANSWER DOWNLOAD EXAMIANS APP
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