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What conclusion can you draw from the following observations on a resistor made of alloy manganin ? |
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Answer» SOLUTION :The resistance for various observations (in ohm), is as follows: `R = (3.94)/(0.2) ,(7.87)/(0.4) , (11.8)/(0.6) ,(15.7)/(0.8) , (19.7)/(1.0) , (39.4)/(2.0) , (59.2)/(3.0) , (78.8)/(4.0) , (98.6)/(5.0),(118.5)/(6.0) , (138.2)/(7.0) , (158.0)/(8.0) = 19.7 OMEGA ` Since resistance is constant, it means manganin alloy obeys Ohm.s law and the RESISTIVITY of thealloy manganin is INDEPENDENT of temperature. |
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