Electrical Machines
For a DC Shunt Motor having armature resistance of 0.5 Ω and 2A armature current at no-load, when the armature current is changed to 20A at loaded condition the speed is 1000 r.p.m. What is the speed at no-load?

 1130 r.p.m.
 1037.5 r.p.m.
 4575.4 r.p.m.
 963.8 r.p.m.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
What will happen if the the supply terminals are reversed in case of a DC shunt motor?

 The motor will stop.
 The motor will run at its normal speed in the same direction as before.
 The motor will run much faster in the same direction.
 The motor will run in reverse direction.

ANSWER DOWNLOAD EXAMIANS APP