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The temperature coefficient of resistance of a wire is 0.00125^@ C^(-1) w.r.t temperature at 300 K at which the resistance of the wire is one ohm. Find the temperature at which the resistance of the wire will be 2 ohm. |
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Answer» Solution :`alpha = 0.00125^@ C, t_1 = 300 K,R_1 =1 Omega` `R_2 = 2Omega, t_2=?` Temperature coefficient resistance `alpha =(R_2 -R_1)/(R_ (t_2 -t_1)) , 0.00125 = (2-1)/(1(t_2 - 300))` `t_2-300 =1/(0.00125)` `t_2 =300 +(10^3)/(1.25) = 300 + 800 = 1100 K` Final temperature `t_2 = 1100 K` |
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