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What conclusion can you draw from the following observations on a resistor made of alloy manganin?

3.17 What conclusion can you draw from the following observations on a resistor made of alloy manganin?

Current

A

Voltage

V

Current

A

Voltage

V

0.2 3.94 3.0 59.2
0.4 7.87 4.0 78.8
0.6 11.8 5.0 98.6
0.8 15.7 6.0 118.5
1.0 19.7 7.0 138.2
2.0 39.4 8.0 158.0

 

Answers (1)
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The ratio of Voltage to current for the various values comes out to be nearly constant which is around 19.7.

Hence the resistor made of alloy manganin follows Ohm's law.

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