Question

The drop in potential across a resistor in a circuit is 40 V. What is the current flowing through the resistor if the resistance is 2.0 ?

Answer 1

According to the Ohm's Law,

`V=IR`

where V is the potential drop, R is the resistance and I is the current flowing through the resistor.

Substituting the known values,

`\begin{gathered} 40=I*2 \\ I=(40)/(2) \\ I=20\text{ A} \end{gathered}`

Thus, the current flowing through the resistor is 20 A.