Electrical Machines In a loaded DC generator, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will deteriorate with rise in terminal voltage. improve with rise in terminal voltage. improve with fall of terminal voltage. deteriorate with fall of terminal voltage. deteriorate with rise in terminal voltage. improve with rise in terminal voltage. improve with fall of terminal voltage. deteriorate with fall of terminal voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound? 541.67V, 250 rpm. 2166.67V, 270 rpm. 541.67V, 200 rpm. 2166.67V, 230 rpm. 541.67V, 250 rpm. 2166.67V, 270 rpm. 541.67V, 200 rpm. 2166.67V, 230 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which type of motors are used for lathes? Synchronous motor. Cage induction motor. Either A or B. DC shunt motors. Synchronous motor. Cage induction motor. Either A or B. DC shunt motors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is/are the necessary conditions for parallel operation of alternators? Speed of alternators should be same Terminal voltage is same Both 1and 2 Frequency should be same Speed of alternators should be same Terminal voltage is same Both 1and 2 Frequency should be same ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Find the reactance voltage when current is changed from -2A to 2A in 4 sec and self inductance is 1H? 2 V 4 V 0 V 1 V 2 V 4 V 0 V 1 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the handle of a three point starter goes to back to OFF position, it may be due to zero or very low voltage supply. all of these. high filed circuit resistance. over load. zero or very low voltage supply. all of these. high filed circuit resistance. over load. ANSWER DOWNLOAD EXAMIANS APP
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