Q1. A separately excited D.C motor has an armature resistance of 0.5ohms . It runs from a 250V D.C supply drawin an armature current of 20A at 1500rpm .!hat will "e the tor#ue de$eloped for an armature current of 10A at same field current% Q2. &ow a differentially compound motor will "eha$e in hih o$er'load conditions appropriate reason. Q). A current'carryin conductor ha$in lenth *dl+ is placed in a manetic fiel manetic flux intensity is *-+ "y which rule the direction of force in the cond determined. /xplain in "rief. Q . !hat will happen to a 2)0V DC motor if it is connected "y 2)0V AC supply% Q5. If six 33/,s are connected in a "ride confiuration then they can "e dri$ $oltae source in$erter. ,4 / or 3A67/% 8ustify your answer.
Q1. A separately excited D.C motor has an armature resistance
of. It runs from a D.C supply drawing an armature current of at
.What will be the torque developed for an armature current of at
same field current?
Q2. How a differentially compound motor will behave in high
over-load conditions? Give appropriate reason.
Q3. A current-carrying conductor having length dl is placed in a
magnetic field. The magnetic flux intensity is B, by which rule the
direction of force in the conductor can be determined. Explain in
brief.
Q4. What will happen to a 230V DC motor if it is connected by
230V AC supply?
Q5. If six MOFFETs are connected in a bridge configuration then
they can be driven as a voltage source inverter. TRUE or FALSE?
Justify your answer.
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