why dc current is supplied in america rather than ac

1 Answers  

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how a DC clampmeter works if DC cant b step up r down?

1 Answers  

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why we r fixing harmonic filter

3 Answers   Siemens,

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what is the difference between a feeder and a cable?

3 Answers  

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What is Electrical Grade Aluminum for Tubular BusBars. i am confused between 6063 and T6 or T5 and what is BS 2898 and BS 159?

0 Answers  

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why tertiary winding is used in transformer with diagram?

0 Answers  

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Why 30kw 40 hp 4 pole 3ph induction motor over heated?any steps on reduction in heat?

0 Answers  

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resistance of transformer oil=?

1 Answers   HCL,

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Dyn1 transformer vector group testing how to do

0 Answers  

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1. alternator has full load regulation of 4% when pf of the load is 0.8 lag, 1500 rpm. full load regulation of 1400 rpm for 0.8lag will be ________ ?? 2. torque angle of a sync m/c operating from a constt voltage bus is usually defined as space angle between _______ . 3. method most effective in finding out no load losses in large DC shunt motoris ______ . 4. current carrying capacity of fuse material depends on ______ . 5. coil has res. 10 ohm, inductance 1H. what wil be current after 0.1sec after switching on to a 500V DC SUPPL ? ? 6. effect of phase lag compensation on servo systems ___________ . 7. rotor of a dc machine is usually supported upon ______ . 8. DC motor is preferred to AC motor in which application ?? 9. 3 nos of 10:1 Xmer are connected in Star-Delta to supply a load at 230V.the supply voltage must be ______ . 10. voltage source produces max current in which circuit. 11. cal. power, if current and voltage are out of phase by 90 degree. 12. suitable length of Xmission line of power at 66 KV. 13. Which of the theorm helps in simple computation when the load across a ckt is varying ?? 14. what is the adopted line length for power Xmission of power by cables ??

5 Answers   TATA,

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If the rank of a (5x6)matrix Q is 4, then which one of the following statements is correct ?

1 Answers   GATE,

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WHAT KIND OF LIGHTENING PROTECTION SCHEMS CAN BE ADOPTED FOR THE FLAT ROOF OF BIG DIMENSION.

0 Answers  

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