Question

Calculate the current through a 3.0 ω resistor with a voltage of 9.0 v across it.

Answer 1

Answer: 3 A

Explanation:

According to Ohm's law:  

$V=R.I$

Where:

$V=9 V$ is the voltage

$R=3\Omega$ is the resistance of the resistor

$I$ is the electric current (the value we want to find)

Isolating $I$:

$I=\frac{V}{R}$

$I=\frac{9 V}{3\Omega}$

Finally:

$I=3 A$