Electrical Machines The demagnetising component of armature reaction in a DC generator increases armature speed. reduces generator emf. reduces inter poles flux density. results in sparking trouble. increases armature speed. reduces generator emf. reduces inter poles flux density. results in sparking trouble. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two identical loss less series motors connected in series across a dc supply voltage, runs at speed of N1 and N2, then ratio of their output power is N12 : N22. none. N1 : N2. 1 : 1. N12 : N22. none. N1 : N2. 1 : 1. 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 and 2 1, 2 and 3 1 and 3 2 alone 1 and 2 1, 2 and 3 1 and 3 2 alone ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 230 V dc series generator is driven at its rated speed. The no-load voltage across its armature terminals would be somewhat less than 230 V 230 V 6 V somewhat more than 230 V somewhat less than 230 V 230 V 6 V somewhat more than 230 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Synchronous condensers are used to All of these improve the power factor improve starting torque reduce hunting All of these improve the power factor improve starting torque reduce hunting ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If input of a transformer is square wave the output will be pulsed wave. square wave. triangular wave. sine wave. pulsed wave. square wave. triangular wave. sine wave. ANSWER DOWNLOAD EXAMIANS APP
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