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7.3 series and parallel circuits
The document discusses series and parallel circuits in electricity, highlighting that series circuits provide a single path for current, causing bulbs to glow dimly and go out if one bulb fails. In contrast, parallel circuits offer multiple paths, allowing bulbs to maintain full brightness even if one fails, as each is directly connected to the battery. It also compares the behavior of current and potential difference in both circuit types, noting differences in resistance and current distribution.
7.3 series and parallel circuits
- 1. Chapter 7: Electricity Part 3: Series and Parallel Circuits
- 2. Series Circuits To forma single path for current flow
- 3. Series Circuits Thereforeeach bulb glows dimly
- 4. Series Circuits Therefore brightnessof each bulb is the same
- 5. Series Circuits Andthe other bulbs go out as well
- 6. Parallel Circuits To formseparate and parallel paths for current flow
- 7. Parallel Circuits Each bulb is connected directly to the battery Because each bulb gets the full potential difference
- 8. Parallel Circuits Than each bulb in a series circuit
- 9. Parallel Circuits The circuitremains unbroken So the other two bulbs will remain to work
- 10. Compare the Circuits’Current Series Circuit Parallel Circuit A X A1 3Ω X Y Y A1 A2 A2 3Ω 1Ω 1Ω Current has only one path to flow Current splits into different paths Reading on A1 = Reading on A2 Reading on A = Reading on A1 + A2 Same current flows through each Main current is shared between the resistors two resistors
- 11. Compare the Circuits’Potential Difference Series Circuit Parallel Circuit X Y V1 X 3Ω 3Ω 1Ω V1 V2 Y 1Ω V V2 Reading on V = Reading of V1 + V2 Reading on V1 = Reading on V2 Potential Difference is shared by the Potential difference is the same two resistors across each resistor
- 12. Compare the Circuits Series Circuit Parallel Circuit When one bulb has blown up When one bulb has blown up The other bulb would not be able to The other bulb can still light up light up
- 13. Compare the Circuits Series Circuit Parallel Circuit Dimmer bulbs Brighter bulbs Less voltage across each bulb Higher voltage across each bulb Less current pass through each bulb Larger current pass through each bulb
- 14. Determining Effective Resistance Series Circuit Parallel Circuit I1 R1 I2 R2 I3 R3 I R1 V1 R2 V2 R3 V3 V1 V2 V3 V V I1 I2 I3 I Current Potential Difference Resistance