A specimen of material X carries a current of when a potential difference of is…
PHYSICS · Subjective · CBSE · Physics · Current Electricity · Current Electricity
Problem
A specimen of material X carries a current of 2A when a potential difference of 5V is applied across it. When the potential difference is increased to 15V, the current rises to 4A.
(i) Calculate the resistance of X at each voltage.
(ii) State, with reason, whether material X obeys Ohm’s law.
(iii) Comment on the nature of variation of resistance with applied voltage for this material.