Series and Parallel Circuits Worksheet - Free Printable

To determine whether each circuit is series or parallel, we need to analyze the flow of current through the components (light bulbs in this case). Here's a step-by-step explanation for each circuit:

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Key Definitions:

1. Series Circuit:
- Components are connected end-to-end in a single path.
- Current flows through each component sequentially.
- If one component fails, the entire circuit is broken.

2. Parallel Circuit:
- Components are connected side-by-side, creating multiple paths for current.
- Current splits and flows through each component simultaneously.
- If one component fails, the others remain functional.

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Analysis of Each Circuit:

#### Circuit 1:
- The light bulbs are connected in a single path with no branching.
- Current flows through one bulb after another.
- Conclusion: Series

#### Circuit 2:
- The light bulbs are connected in a loop, forming a single continuous path.
- There are no branches; current flows through each bulb sequentially.
- Conclusion: Series

#### Circuit 3:
- The light bulbs are connected side-by-side, creating multiple parallel paths.
- Current splits and flows through each bulb independently.
- Conclusion: Parallel

#### Circuit 4:
- The light bulbs are connected in a single path with no branching.
- Current flows through one bulb after another.
- Conclusion: Series

#### Circuit 5:
- The light bulbs are connected in a single path with no branching.
- Current flows through one bulb after another.
- Conclusion: Series

#### Circuit 6:
- The light bulbs are connected side-by-side, creating multiple parallel paths.
- Current splits and flows through each bulb independently.
- Conclusion: Parallel

#### Circuit 7:
- The light bulbs are connected in a single path with no branching.
- Current flows through one bulb after another.
- Conclusion: Series

#### Circuit 8:
- The light bulbs are connected in a combination of series and parallel.
- Two bulbs are in series, and this series combination is in parallel with another bulb.
- Since there are multiple paths, it is primarily a parallel circuit.
- Conclusion: Parallel

#### Circuit 9:
- The light bulbs are connected side-by-side, creating multiple parallel paths.
- Current splits and flows through each bulb independently.
- Conclusion: Parallel

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Final Labels:

1. Series
2. Series
3. Parallel
4. Series
5. Series
6. Parallel
7. Series
8. Parallel
9. Parallel

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Boxed Answer:

$$
\boxed{\text{1) Series, 2) Series, 3) Parallel, 4) Series, 5) Series, 6) Parallel, 7) Series, 8) Parallel, 9) Parallel}}
$$