Suppose you conducted an experiment on an ohmic material. When subjected to a potential difference 1V, the current across the material is 4A; and when the potential difference is increased to 2V, the current across the material increases to 8A. 1) What is the resistance of the material? a) 4 Ω b) 0.50 Ω c) 2 Ω d) 0.25 Ω 2) If you plot the applied potential difference (y-axis) versus the measured current (x-axis)across the material, what should be the expected value of the y-intercept? a) 0 V b) 0.25 V c) 4 V d) 2 V answer all the questions and put explanation for an upvote

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Resistivity

Resistivity is a characteristic property of the conductor’s material that measures the extent to which the material opposes the flow of current. It is denoted by the Greek letter “rho”. Electrical resistivity, also known as specific resistance, depends on the nature of the material of the conductor and is unaffected by its dimensions.