Question

Determine the resistance per cm of a given wire by plotting graph of difference versus current.

Answer 1

Answer:

Straight line graph

Explanation:

Current is directly proportional to voltage and inversely proportional to resistance. ... A resistor is 'Ohmic' if as voltage across the resistor is increased, a graph of voltage versus current shows a straight line (indicating a constant resistance). The slope of the line is the value of the resistance.