In this lesson, you will ensure that you had fully understood the Ohm’s law.

## Resistors in series and parallel

When:

• $V$ = 10 V
• $R_{1}$ = 10 ohm
• $R_{2}$ = 20 ohm
• $R_{3}$ = 40 ohm

What is $I_{2}$, the current flowing through $R_{2}$?

## Hints

• Solve the total resistance of $R_{2}$ and $R_{3}$, $R_{2and3}$ first.
• Total resistance is $R_{total} = R_{1} + R_{2and3}$.

## Other lessons

Other lessons in Electronics Basic Course: