Grade 9 Parallel Circuits Worksheet
A worksheet for Grade 9 students to practice understanding and analyzing parallel circuits, including current, voltage, and resistance.
Includes
Standards
Topics
Grade 9 Parallel Circuits Worksheet
Name:
Date:
Score:
Read each question carefully and answer to the best of your ability. Show all your work for calculation problems.
1. Which statement is TRUE for a parallel circuit?
The current is the same through all branches.
The total resistance is the sum of individual resistances.
The voltage across each branch is the same.
If one component fails, the entire circuit fails.
2. Adding more resistors in parallel to a circuit will:
Increase the total resistance.
Decrease the total resistance.
Have no effect on total resistance.
Increase the voltage across each resistor.
Use the diagram below to answer the following questions.
3. If the voltage source is 12V and R1 = 4Ω, R2 = 6Ω, and R3 = 12Ω, calculate the equivalent resistance of the circuit.
4. Calculate the total current flowing from the voltage source.
5. What is the current flowing through R2?
6. In a parallel circuit, the voltage across each branch is .
7. If one bulb in a parallel circuit burns out, the other bulbs will .
8. The total current in a parallel circuit is the of the currents in each branch.
9. Parallel circuits are commonly used in household wiring.
True
False
10. The equivalent resistance of a parallel circuit is always greater than the smallest individual resistance.
True
False
11. Explain why Christmas tree lights are typically wired in parallel rather than in series.