InterviewSolution
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InterviewSolution
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| Answer» <p>Intial resistance of nichrome wire R1 = 230 / 3.2 = 71.875 ohm</p><p>final resistance R2 = 82.142857 ohm</p><p>Change in resistance = 82.142857 - 71.875 = 10.267 ohm</p><p>We know that change in resistance is directly proportional to the initial resistance and on the change in temperature</p><p>Let's denote the change by dR, the temperature coefficient A = 1.7 x 10^-4</p><p>dR = R1 x A x dT</p><p>dT = dR / A x R1 = 10.267 / 1.7 x 10^-4 x 71.875</p><p>dt = 840 C</p><p>Final steady temperature of the wire</p><p>840 + 27 = 867 C</p> | |