Class 12 Physics Current Electricity: NCERT Solutions for Question 5

This page offers a step-by-step solution to the specific question NCERT Class 12th Physics - Current Electricity | at room temperature 27 0 deg c the resistance o Answer from NCERT Class 12th Physics, Chapter Current Electricity.
Question 5

At room temperature (27.0 °C) the resistance of a heating element is 100 Ω. What is the temperature of the element if the resistance is found to be 117 Ω, given that the temperature coefficient of the material of the resistor is 1.70 x 10-4 °C-1

Answer

Room temperature, T = 27°C

Resistance of the heating element at T, R = 100 Ω

Let T1 is the increased temperature of the filament.

Resistance of the heating element at T1, R1 = 117 Ω

Temperature co-efficient of the material of the filament,

Therefore, at 1027°C, the resistance of the element is 117Ω.

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