3. Electrical Systems

Parallel Circuits — Quiz

Test your understanding of parallel circuits with 5 practice questions.

Practice Questions

Question 1

What is the equivalent resistance of three resistors with values $6\,\Omega$, $3\,\Omega$, and $2\,\Omega$ connected in parallel?

Question 2

In a parallel circuit with a $12\,\text{V}$ supply and two resistors $R_1=4\,\Omega$ and $R_2=6\,\Omega$, what is the current through $R_1$?

Question 3

If one branch in a parallel circuit becomes open (infinite resistance), what happens to the currents through the remaining branches?

Question 4

In a parallel circuit with two resistors $R_1=5\,\Omega$ and $R_2=10\,\Omega$, what is the ratio $I_1/I_2$ of branch currents?

Question 5

For two resistors $4\,\Omega$ and $16\,\Omega$ connected in parallel across a $12\,\text{V}$ source, what is the ratio of power dissipated in the $4\,\Omega$ resistor to that in the $16\,\Omega$ resistor?