What conclusion can you draw from the following observations on a resistor made of alloy manganin?
`{:("Current","Voltage","Current","Voltage"),(A,V,A,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):}`

Explanation

Since the ratio of voltage and current for different readings is same so ohm's law is valid to high accuracy. The resistivity of the alloy manganin manganin is nearly independendent of temperature.