Consider a graph in which potential difference is plotted along the horizontal axis…
PHYSICS · Single correct · A Level · Physics · Electricity · Electricity
Problem
Consider a graph in which potential difference V is plotted along the horizontal axis and current I along the vertical axis for a metallic resistor kept at constant temperature. Which one of the following statements is correct for the straight-line part of the graph?
(a) The slope of the straight line equals the resistance of the resistor.
(b) The slope of the straight line equals the reciprocal of the resistance of the resistor.
(c) The slope of the straight line increases with increase in the applied voltage.
(d) The slope of the straight line equals the resistivity of the material of the resistor.