CBSE Class 12 · 2005 · Current ElectricityShort Answer

Draw the

V

–

I

graph for ohmic and non-ohmic materials. Give one example of each.

Solution

For an ohmic material

V = I R

with

R

constant, so the

V

–

I

plot is a straight line through the origin. For a non-ohmic material

R

is not constant, so the characteristic is curved (e.g. a diode).

CBSE Class 12 Board · 2005 · Subjective