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# Series And Parallel Circuits

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• ### Series And Parallel Circuits

1. 1. circuit symbols
2. 2. symbols review
3. 3. an electrical circuit <ul><li>A current will only flow if there is: </li></ul><ul><li>a supply of electrical energy ( an e.m.f.) & </li></ul><ul><li>a complete circuit. </li></ul>
4. 4. a series circuit A series circuit is one where the current has “no choice” as to which “path” to follow. There are no junctions in a series circuit.
5. 5. switches in a series circuit A single switch will control all the lamps in a series circuit.
6. 6. adding lamps to a series circuit Adding extra lamps to a series circuit reduces their brightness.
7. 7. a parallel circuit A parallel circuit is one where the current has a “choice” as to “which path” to follow.
8. 8. switches in a parallel circuit A switch in a parallel circuit can control a single lamp.
9. 9. switches in a parallel circuit A switch in a parallel circuit can control all the lamps.
10. 10. adding lamps to a parallel circuit Adding extra lamps to a parallel circuit does not reduce their brightness.
11. 11. series circuits <ul><li>A series circuit is one where the current has “no choice” as to which “path” to follow. </li></ul><ul><li>There are no junctions in a series circuit. </li></ul><ul><li>A single switch will control all the lamps in a series circuit. </li></ul><ul><li>Adding extra lamps to a series circuit reduces their brightness. </li></ul>
12. 12. parallel circuits <ul><li>A parallel circuit is one where the current has a “choice” as to “which path” to follow. </li></ul><ul><li>A switch in a parallel circuit can control a single lamp. </li></ul><ul><li>A switch in a parallel circuit can control all the lamps. </li></ul><ul><li>Adding extra lamps to a parallel circuit does not reduce their brightness. </li></ul>