Practice Parallel Circuit in Physics
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
A circuit in which components are connected across the same two points, so each has the same voltage across it.
Like a river splitting into branches — the water (current) divides, but the pressure drop (voltage) across each branch is the same.
Example 1
mediumTwo resistors (6 \text{ } \Omega and 12 \text{ } \Omega) are connected in parallel to a 12 \text{ V} battery. What is the total resistance and the current through each resistor?
Example 2
hardThree identical 30 \text{ } \Omega resistors are connected in parallel. What is the total resistance?
Example 3
mediumA 10 \text{ } \Omega and a 15 \text{ } \Omega resistor are in parallel. What is the combined resistance?
Example 4
mediumThree resistors of 6 \text{ } \Omega, 12 \text{ } \Omega, and 4 \text{ } \Omega are connected in parallel. Find the total resistance.
Example 5
mediumTwo resistors (10 \text{ } \Omega and 15 \text{ } \Omega) are connected in parallel across a 30 \text{ V} supply. Find: (a) total resistance, (b) total current, (c) current through each resistor.