high resistance wires 係唔係 used in electric heaters ?
why ?
應用 P = I^2 R
ｏｒ P = V^2/ R ??
also, for a given voltage supplied, will a high resistance generate more heat than a lower one ?
RESISTANCE
2007-09-28 4:46 am
回答 (2)
2007-09-28 6:02 am
✔ 最佳答案
No, wires of low resistance will generate more heat than those of high resistance because the former permit a larger current to flow through.The two equations P=I^2R and P=V^2/R are representing the the same power, only they are given in different forms depending on whether the current I or voltage V is know. The application of either one of them would give the same result.
2007-10-01 12:32 am
electric heater is major for medium of minials, length.
In domestic.. the constant 220V A.C.is standard..
by standard product.. 1500W, 2000W, 3000W heater..
By calculation: 3000w = 200V x I.(current)
The I^2R, and V^2R not use in the market's heater..
...
In domestic.. the constant 220V A.C.is standard..
by standard product.. 1500W, 2000W, 3000W heater..
By calculation: 3000w = 200V x I.(current)
The I^2R, and V^2R not use in the market's heater..
...
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