DC Motors If a dc motor is comnected across the AC supply it will Run at lower speed Run at normal speed Burn due to heat produced in the field winding by eddy currents Not run Run at lower speed Run at normal speed Burn due to heat produced in the field winding by eddy currents Not run ANSWER DOWNLOAD EXAMIANS APP
DC Motors By putting controller resistance in series with the armature of a dc motor, we can obtain speeds Above the normal speed only Above as well as below the normal speed Below the normal speed only None of the listed here Above the normal speed only Above as well as below the normal speed Below the normal speed only None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors In case the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be Anywhere between 75% and 90% Around 90% 1 Less than 50% Anywhere between 75% and 90% Around 90% 1 Less than 50% ANSWER DOWNLOAD EXAMIANS APP
DC Motors The greatest percentage of power loss in a dc motor is due to Windage loss Friction loss Core loss Copper loss Windage loss Friction loss Core loss Copper loss ANSWER DOWNLOAD EXAMIANS APP
DC Motors Ward-Leonard control is basically a Field divertor method Armature resistance control method Voltage control method Field control method Field divertor method Armature resistance control method Voltage control method Field control method ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which method of braking is generally used in elevators? Regenerative braking Rheostat braking None of these Plugging Regenerative braking Rheostat braking None of these Plugging ANSWER DOWNLOAD EXAMIANS APP
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