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Q#1
DC Machines
GATE EE 1997
NAT
+2 marks
-0 marks
At 50% of full load, the armature current drawn by a DC shunt motor is 40A when connected to a 200V DC mains. By decreasing the field flux, its speed is raised by 20% this also causes a 10% increase in load torque. Calculate the percentage change in field current. The armature resistance including the brushes is 1 Ohm. Neglect saturation and armature reaction.
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Browse Practice Questions by Chapters / Topics in Browse Practice Questions by Chapters / Topics in GATE Electrical Engineering
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| Topic | Questions | Attempted | Correct | |
|---|---|---|---|---|
| Network Analysis | 268 | 0 | 0 | |
| Signals and Systems | 168 | 0 | 0 | |
| Control Systems | 262 | 0 | 0 | |
| Analog Electronics | 186 | 0 | 0 | |
| Digital Electronics | 150 | 0 | 0 | |
| Electrical Machines | 399 | 0 | 0 | |
| Power Electronics | 243 | 0 | 0 | |
| Power Systems | 350 | 0 | 0 | |
| EMFT EE | 111 | 0 | 0 | |
| Measurement | 160 | 0 | 0 | |
| Engineering Mathematics | 236 | 0 | 0 | |
| General Aptitude | 221 | 0 | 0 |
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