Physics
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?
Answer
The conductors which obey the Ohm's law are called the ohmic resistors or linear resistances. Examples are all metallic conductors (such as Silver, Aluminium, Copper, Iron etc.)
Current–Voltage relationship of an ohmic resistor is shown in the below graph:
Resistance is determined in the form of slope from the graph.
Related Questions
(a) Draw a V-I graph for a conductor obeying Ohm's law.
(b) What does the slope of V-I graph for a conductor represent?
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?
What are non-ohmic resistors? Give one example and draw a graph to show it's current-voltage relationship.
Draw an I-V graph for a linear resistor. What does it's slope represent?