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



From the given information shown in the table, the ratio of voltage and current is a constant value and the value is equal to 19.7 Hence manganin is a Ω ic conductor.

According to Ohm’s law the ratio of voltage and current is resistance of conductor so Resistance of manganin is 19.7 Ω .


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