The resistance of a coil in a platinum resistance thermometer at 0-C is 5 ohm and at 100-C it is 5-75 ohm- Its resistance at an unknown temperature is 5-15 ohm- Then the unknown temperature will be -

The correct option is D 20^∘C We know that R=R_0(1+α. T) Thus, temperature coeff ...

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Standard XII

Physics

RMS Value

The resistanc...

Question

The resistance of a coil in a platinum resistance thermometer at $0^{\circ} C$ is 5 ohm and at $100^{\circ} C$ it is 5.75 ohm. Its resistance at an unknown temperature is 5.15 ohm. Then the unknown temperature will be :-

40^{\circ} C

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10^{\circ} C

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15^{\circ} C

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20^{\circ} C

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Solution

The correct option is D $20^{\circ} C$
We know that $R = R_{0} (1 + α . T)$
Thus, temperature coeff

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The resistance of a coil in a platinum resistance thermometer at 0∘C is 5 ohm and at 100∘C it is 5.75 ohm. Its resistance at an unknown temperature is 5.15 ohm. Then the unknown temperature will be :-

The correct option is D 20∘CWe know that R=R0(1+α.T)Thus, temperature coeff

The resistance of a coil in a platinum resistance thermometer at $0^{\circ} C$ is 5 ohm and at $100^{\circ} C$ it is 5.75 ohm. Its resistance at an unknown temperature is 5.15 ohm. Then the unknown temperature will be :-

The correct option is D $20^{\circ} C$
We know that $R = R_{0} (1 + α . T)$
Thus, temperature coeff