Answer / prabhakar sankle

Transformer functioning only with a.c supply.Because there is need mutual induction in coil and core.It couldn't happen with DC supply.

Answer / pavan sharma

If dc supply is given to xmer then pri wdg has no recatance so impadance is low due to low resistance so dc supply burn primary

a power supply to be constructed from voltage cells is required to provide Max. 20A Current with a terminal voltage of 6v.Several voltage cells are available each of which has terminal voltage of 1.5V & each of which can supply a max current of 5A .the no of cells required will be ??

5 Answers  

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calotropis is an example of the following phyllotaxy

1 Answers   APGenco,

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Write the force balance equation of m ideal mass element.

0 Answers  

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Radio Carbon dating is used in a) find diseases b) find the age of relics c) find the carbon content in the atmosphere d) none of these

2 Answers  

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why making capacity is more than breaking capacity?

14 Answers   Essar, Indo Asian, Infinity,

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why we step down the voltage from 440 to 220 in machines

4 Answers  

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Grid fault level [KA]?

0 Answers  

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what is the diff. b/w restricted earth fault relay & standby earthfault relay and where they are used?

4 Answers   KSK Energy, Reliance,

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What is the difference between phase current & line current, how both can be measured in star and delta system

9 Answers   Doshion, MIT,

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what is safety measures of alternator.

10 Answers   HP, MNC,

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What is step signal?

0 Answers  

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what is cogging in motors?

1 Answers  

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