Physics
Draw a V-I graph for a conductor at two different temperatures. What conclusion do you draw from your graph for the variation of resistance of conductor with temperature?
Answer
V-I graph of a conductor at two different temperatures T1 and T2 is shown below:
Figure shows two straight lines A and B on the V-I graph for a conductor at two different temperatures T1 and T2 (T1 > T2) respectively.
The straight line A is more steeper than the line B because the resistance of conductor is more at high temperature T1 than at low temperature T2
Related Questions
Draw an I-V graph for a linear resistor. What does it's slope represent?
What is an ohmic resistor? Give one example of an ohmic resistor. Draw a graph to show it's current–voltage relationship. How is the resistance of the resistor determined from this graph?
What are non-ohmic resistors? Give one example and draw a graph to show it's current-voltage relationship.
(a) How does the resistance of a wire depend on it's radius? Explain your answer.
(b) Two copper wires are of same length, but one is thicker than the other. Which will have more resistance?