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stardust289
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A carbon wire and a Nichrome wire are connected one after the other. If the combination has total resistance of 10.0 k ohm at 20°C, what is the resistance of each wire at 20°C so that the resistance of the combination does not change with temperature?(resistivity at 20°C of: nichrome= 1.5x10^-6 ohms m, Carbon= 3.5x 10^-8 ohms m, Temp. coef of resistivity: nichrome= .4x 10^-3/°C, carbon:-.5x10^-3/°C)
that's the question and here is what i did...
[1.5x 10^-6ohms(1+.4x10^-3)0]+[3.5x10^-8ohms(1+-.5x10-3)0]= 10 ohms
i was given 4 points out of 20. could someone explain the correct answer to me...
that's the question and here is what i did...
[1.5x 10^-6ohms(1+.4x10^-3)0]+[3.5x10^-8ohms(1+-.5x10-3)0]= 10 ohms
i was given 4 points out of 20. could someone explain the correct answer to me...