Electrical Machines A DC series motor is running with a divertor connected across its field winding. If the divertor resistance is reduced then the speed of the motor will decrease. remain unaltered. become execessively high. increase. decrease. remain unaltered. become execessively high. increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which DC motor will have least percentage increase of input current, for the same percentage increase in the torque DC Series Motor Separately Excited DC Motor DC Shunt Motor Compound Wound DC Motor DC Series Motor Separately Excited DC Motor DC Shunt Motor Compound Wound DC Motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed regulation of a DC motor is given as (NnL − NfL)/NfL. (NfL − NnL)/NnL. NnL − NfL. NnL/NfL. (NnL − NfL)/NfL. (NfL − NnL)/NnL. NnL − NfL. NnL/NfL. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements : For a level compounded dc generator to run at constant voltage, the series field mmf must effectively compensate 1. armature reaction mmf 2.armature resistance drop 3. brush contact voltage drop Which of these statements is/are correct ? 1, 2 and 3 1 and 2 1 and 3 2 alone 1, 2 and 3 1 and 2 1 and 3 2 alone ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The ___________________ generator has the poorest voltage regulation. under-compounded. shunt. over compounded. differential compounded. under-compounded. shunt. over compounded. differential compounded. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC Shunt Motor if the load current increases keeping the terminal voltage constant, then flux will remain constant. any of the above. increase. decrease. remain constant. any of the above. increase. decrease. ANSWER DOWNLOAD EXAMIANS APP
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