Grade 12 Physics: Parallel Circuits
This worksheet covers fundamental concepts and calculations related to parallel circuits for Grade 12 Physics students.
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Grade 12 Physics: Parallel Circuits
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Read each question carefully and provide your answers in the space provided. Show all your work for calculation questions.
1. Which of the following statements is TRUE for a parallel circuit?
The total resistance is the sum of individual resistances.
The current is the same through each branch.
The voltage drop is the same across each branch.
If one component fails, the entire circuit stops working.
2. Adding more resistors in parallel to an existing parallel circuit will:
Increase the total resistance.
Decrease the total current.
Decrease the total resistance.
Increase the voltage across each resistor.
3. In a parallel circuit, the reciprocal of the total resistance is equal to the sum of the of the individual resistances.
4. The total current in a parallel circuit is the of the currents in each branch.
5. Explain why household electrical outlets are wired in parallel.
6. Consider the parallel circuit shown below:
If R1 = 10 Ω, R2 = 20 Ω, and the voltage of the power source is 12 V, calculate the following:
a) Total equivalent resistance (Req):
b) Total current (Itotal):
c) Current through R1 (I1):
d) Current through R2 (I2):
7. If one bulb in a parallel circuit burns out, the other bulbs will go out as well.
True
False
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