Parallel Circuits Worksheet
Explore the principles of parallel circuits, including current, voltage, and resistance calculations, with this Grade 10 science worksheet.
Includes
Standards
Topics
Parallel Circuits
Name:
Date:
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Read each question carefully and answer to the best of your ability. Show all your work for calculation questions.
1. In a parallel circuit, what remains constant across all branches?
Current
Resistance
Voltage
Power
2. Adding more resistors in parallel to a circuit will:
Increase total resistance
Decrease total resistance
Have no effect on total resistance
Increase total voltage
3. In a parallel circuit, the total current is the of the currents in each branch.
4. If one bulb in a parallel circuit burns out, the other bulbs will .
5. The reciprocal of the total resistance in a parallel circuit is equal to the sum of the of the individual resistances.
6. Consider the parallel circuit shown below:

If R1 = 10 Ω, R2 = 20 Ω, and the voltage source is 12 V, calculate the total resistance of the circuit.
7. Using the values from question 6, calculate the total current flowing from the voltage source.
8. Explain why household electrical wiring is typically arranged in parallel rather than in series.
9. The current is the same through each resistor in a parallel circuit.
True
False
10. If one branch of a parallel circuit is broken, the entire circuit will stop functioning.
True
False
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