Question

Statement 1: The V-I curve for an ohmic resistor is non-linear.

Statment 2: Ohm's law is not a universal law, the substances which obey ohm's law are ohmic substances.

• A. Both the statements are true and statemet 2 is the correct explanation of statement 1
• B. Both the statments are true and statement 2 is not the correct explanation of statament 1.
• C. Statement 1 is true and statement 2 is false.
• D. Statement 1 is false and statement 2 is true.

Answer 1

The correct option is D

Statement 1 is false and statement 2 is true.

Ohmic resistors obey ohm's law i.e. V is directly proportional to R, so the V-I curve is linear for them and non-linear for non-ohmic resistances. Ohm's law is not a universal law because it is not valid for every conducting material present. This is the reason for classification of resistors as ohmic and non-ohmic.