1byah pls .............. ma head ll burst if u don xplain asap.........
22 Answers
62see the resistivity is high..
dotn confuse it with resistance...
If resistance is high, it will reduce the power efficiency of houses..
Do you think people will want to pay "double" bill just to protect a few equipments???
It will be of no use then! the cost involved will be the same... specially in times 10 years back when theere were no computers ;)
1u don worry... blame is on joule....not on u..coz he has given equations in which heat proportional to R in one case(considerin current ind circuit) and heat inversely proportional in another case(considerin voltage in d circuit)..
1well wat i think now is that low resistance has to be there to allow flow of current
i think wire will break due to increased amount of current itself
as H=I2RT
and H proportional to sq of current . ( so current will be more effective )
but some1 do correct me if i m rong [7][7]
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13bhaiya...plz explain...
i was seriously wrong wid my conception
1high hi hoga
as if it will be low to allow the flow of current then wat will be the difference btwn a fuse wire and conducting copper wire
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1DATS WAT I SAID .... LOW RESISTANCE WIRE LL ALLOW IT TO PASS.. SO IT CANNOT BE USED...
MOREOVER FRM JOULES LAW HEAT IS PROPORTIONAL TO RESISTANCE....
SO HIGH RESISTANCE WIRE MELTS EASILY..
13high current should not be allowed to pass....
the use of fuse is just that....
at high current it must generate heat n melt down ...break circuit
1@ ABHI..
HW CLD IT BE????
FUSE WIRE IS MEANT TO STOP HIGH CURRENT .. IN SUCH A CASE , WHEN A CONSIDERABLE AMT OF CURRENT IN A CIRCUIT INCREASES SUDDENLY LOW RESISTANCE WIRE LL ALLOW IT TO PASS ....
SO A WIRE WIT HIGH RESISTANCE N LOW MELTIN POINT IS USED ..
1sorry in the solution its given low resistance so as to allow easy flow of current I also think the resistance should be high
1VIRANG BHAI.. IT HAS LOW MELTIN POINT BUT HIGH RESISTANCE.....