11.3 The electrical resistance in ohms of a certain thermometer varies with temperature according to the approximate law :

R = Ro [1 + α(T – $T_{0}$ )]

The resistance is 101.6 Ω at the triple-point of water 273.16 K, and 165.5 Ω at the normal melting point of lead (600.5 K). What is the temperature when the resistance is 123.4 Ω ?

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Payal Gupta | Contributor-Level 10

8 months ago

11.3 It is given that R = $R_{0}$ [1 + α(T – $T_{0}$ )] ………(i)

Where Ro and To are the initial resistance and temperature and R and T are the final resistance and temperature.

At the triple point of water, To = 273.15 K, $R_{0}$ = 101.6 Ω

At normal melting point of lead, T = 600.5 K, R = 165.5 Ω

Substituting these values in

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