Why the brushes used in dc machines are made of carbon not from other metal?

2 Answers  

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Why grables are put in substation?

1 Answers  

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Describe: Energy efficient motors

1 Answers   Reliance,

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for a slip ring induction motor if the stator is short circuited and rotor is given supply? how does the rotor rotate?

1 Answers   TNEB Tamil Nadu Electricity Board,

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The MCB circuit breaker have a voltage rating of 440VAC it's possible to supply a voltage of 480Vac

1 Answers  

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Details about Flux Compensated magnetic Amplifer starter for motors

0 Answers  

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What is maximum load capacity of 800 VA inverter?

5 Answers  

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difference between fleming's left hand rule and RHR briefly.

3 Answers  

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which part of transformer heats up the most and why? windings, core or oil .

3 Answers   Lafarge,

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why the capacitors works on ac only

5 Answers  

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IN OLTC we observed "OUT OF STEP" Alarm, we have two different transformer, when both are in parallel this type of alarm observed. what's the meaning of this alarm and why it occurs???

3 Answers  

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IS THE ANY DIFFERENCE B/W GENERATORS & ALTERNATORS

6 Answers  

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