Question

Ohm's law is valid if

• A. $V$ is directly proportional to $I^{3}$
• B. the relation between $V$ and $I$ is non-unique
• C. $V$ is directly proportional to $I^{2}$
• D. $V$ depends on $I$ linearly

Answer 1

Answer: (D)

According to Ohm's law
$V \propto I$ or $V=R I$
where the constant of proportionally $R$ is called the resistance of the conductor.
From the above relation it is clear that Ohm's law is valid if $V$ depends on $I$ linearly.