Question

Which of the following relation is correct? Assume terms have their standard meanings.

• A. $V=QR$ at constant temperature
• B. $V=\frac{Q}{R}$ at constant temperature
• C. $V=IR$ at constant temperature
• D. $V=\frac{I}{R}$ at constant temperature

Answer 1

The correct option is C $V=IR$ at constant temperature

According to Ohm's Law, electric current flowing $\left(I\right)$ through a conductor is directly proportional to the potential difference $\left(V\right)$ across it at a constant temperature and pressure.
$\Rightarrow I\propto V$
$\Rightarrow V=IR$
where:
$R:$ Resistance of the conductor