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 |
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.