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Circuits
This document discusses different types of electrical circuits including series, parallel, and series-parallel circuits. It explains the relationships between current, voltage, and resistance in series and parallel circuits. Specifically, it states that in a series circuit the current is the same at all points while the voltage drops across each component. In a parallel circuit, the voltage is the same across each branch while the currents combine. It also discusses advantages and disadvantages of series and parallel circuits.
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Circuits
- 2. Different types ofcircuit There are different ways in which you can connect cells and components (such as lamps) to create a circuit: • series • parallel • a mixture of both
- 3. Series and ParallelCircuits Voltage, Current and Resistance Vs I3 I2 I1 R3 +- R2R1 V1 V2 V3 What type of circuit is this?
- 4. Vs I3 I2 I1 R3 +- R2R1 V1 V2 V3 Oneelectrical path from negative to positive therefore series.
- 5. Vs I3 I2 I1 R3 +- R2R1 V1 V2 V3 Whatis the relationship between the three currents? 321 III The current is the same at each point.
- 6. Vs I3 I2 I1 R3 +- R2R1 V1 V2 V3 Whatis the relationship between the four voltages? 321 VVVVs They add to equal the supply voltage.
- 7. Disadvantages of SeriesCircuits? • When one component fails the whole circuit fails. • The current is the same at all points and the voltage is divided between the bulbs. The more bulbs added the dimmer each one is.
- 8. Vs I3 I2 I1 R3 +- R2R1 V1 V2 V3 Howdo you find total resistance in series? 321 RRRRtotal Add each resistance together.
- 9. What type ofcircuit is this? ITIT Vs I3 I2 I1 R3 +- R2 R1 V1 V2 V3
- 10. More than oneelectrical path – components connected on different branches therefore parallel. ITIT Vs I3 I2 I1 R3 +- R2 R1 V1 V2 V3
- 11. What is the relationship betweenthe four currents? 321 IIIIT The four currents add to give the total current. ITIT Vs I3 I2 I1 R3 +- R 2 R1 V1 V2 V3
- 12. What is the relationship betweenthe four voltages? 321 VVVVS Each voltage is equal to the supply voltage. ITIT Vs I3 I2 I1 R3 +- R 2 R1 V1 V2 V3
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- 14. If more resistorsare connected in parallel the total resistance will always decrease This is because there are more branches through which the electricity can flow.
- 15. Advantages of theParallel Circuit? • When one bulb fails the rest of the circuit continues to work. • The more components, the lower the resistance. The total current drawn increases. Voltage in each branch is the same as the supply voltage therefore bulbs in parallel will each be as bright as a single.
- 16. Series-Parallel Circuit Problem Thetotal resistance of the series-parallel connection of three resistors is 11.6 ohms. With Rx as the resistance in series, Ry=2Rz and Rz=2Rx. Find the resistance Ry.