Answer / deepak

bulb is not working because potential difference is zero so from ohms law current is zero.

Answer / murali karri

Always we talk about the potential by taking some reference it may be a ground or neutral. If there is no phase difference b/w those two 230v then the potential difference will be zero and no current will flow through filament.

Answer / archit_asthana

The resulting potential difference can be any value between 0V to 440 V depending on the phase difference of the two sources.

Answer / md

its depends on phase of supply .. i mean if u give R-phase to one side of lead and other side maybe B or Y phase ,, and if u r supplying both end with same phase

Answer / ashutosh pati

If we gave 220v supply in 2wires then supply ism 415v then the both side of bulb is not working for short time and the filaments are nit work. The bulb rating is limited.

Answer / maneesh

When we have give supply 220 in 2 wire then supply is 415 v then bulb is not work and blast because bulb rating limit cross

Answer / abid

When we have give supply 220 in 2 wire then supply is 415 v then bulb is work for short time and give maximum light then blast because bulb rating limit cross

ynchronous M/C with under excitation with reactive power absorption , acts as a) synch. Motor b) synch gen c) synchr capacit

4 Answers  

Which Programming software are use for Allen bradley PLC's?

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a room heater is connected in serise with a 100w bulb.if the 100w bulb is replaced by a 40w bulb then the output of the heater is increase/decrease/remain same?

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why you don not show protection and type of isolation in key single line diagram?

0 Answers  

what is cogging and crawling

0 Answers   Suzlon,

what is the exact direction of current? as we know current travels from higher potential to lower potential,so if we take battery +ve to -ve implies current direction is from positive terminal to negative terminal.,whereas electrons flow from negative to positive as they are attracted by positive ions.current will be the plow of charge but not flow of positive ions.please clarify my doubt friends.

2 Answers  

What is the use of oil in transformers?

0 Answers  

Whats parameters which we keep in mind when grounded any electrical machine.

1 Answers   Essar,

If a contactor need to replace with faulty one. what I want to check?

2 Answers   Bhel,

what is the different between rms and average value

1 Answers   Finolex, TATA,

How can i check a relay good or not?

2 Answers  

what is tertiary winding in transformer?What is its purpose?

18 Answers   Bhel,