Answer Posted / jayesh

THE ROTIO OF VOLTAGE AND CURRENT IN A CLOSED CIRCUIT IS ZERO.

Why do not we prefer non conventional sources of energy to conventional sources?

1203

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What is Percentage impedence of a transformer? why it is expressed at a percentage? what is the importance of percentage impedence in case of a transformer?

1890

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How is efficiency of DG set calculated? At many places I found the efficiency to be mentioned in percentage. But at some other places I found kWH/ litres. I want to know how dimensionless percentage value is arrived at?

1926

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What do you mean by dependent and independent voltage sources?

1052

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There is air in a room . the top and bottom of the room are at constant temp. T1 and T2. DRAW THE temp profiles if a. T1 greater than T2 b. T1 less than T2

1898

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What do you mean by ratio correction factor of instrument transformer?

1181

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why is a power transformer used only occasionally?it is used to step up at generating stations?and that needs to be done all day long !!!!!!!

1878

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whats the differece between Exd and Exe

4950

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If i am running of spindle at 2000rpm ,but How to spindle stop at the second I am resetting the machine in CNC machines

1641

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Hi all I had applied for the RRB test in the ELECRICAL category. I would be pleased if any of you can sent me previous year question papers. Please forward the question papers to varshashahi@yahoo.com Thanks and regards Varsha

2188

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IN induction motor pf is increased using capacitors.what will be the effect on motor and system when very large capacitor is accidently installed and pf goes leading.

2153

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What are differences between Voltage, EMF & Potential difference ?

2006

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If mutual flux is 1.2wb & power factor is 0.8 lag , then what is the Useful flux of a transformer?

4494

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how much excitation voltage required to generate 1mw power?

2052

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Maintenance of transformer???

2274

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