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SERIES CIRCUITS

SERIES CIRCUITS. Type your answers in the black boxes and check them with the correct answers on the last slide. Rules. Current is the same through all the components. Voltage is shared out across the components. The resistance of components adds together.

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SERIES CIRCUITS

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  1. SERIES CIRCUITS Type your answers in the black boxes and check them with the correct answers on the last slide

  2. Rules Current is the same through all the components Voltage is shared out across the components The resistance of components adds together Potential difference = current x resistance volts = amps x ohms

  3. - - - - - - - - - - - - - - - -

  4. - - - - - - - - - - - - - - - - 3A 3A THE CURRENT IN A SERIES CIRCUIT IS THE SAME AT EVERY POINT. 3A 3A 3A

  5. - - - - - - - - What happens if one lamp is unscrewed? No current flows if there is a gap in the circuit

  6. - - - - - - - - What happens if one cell is turned around? (cells provide a pd to push the charge) Reversing the cell reverses the pushing effect

  7. - - - - - - - - What happens if another cell is added the same way as the others? Increasing the pd in the same direction increases the pushing effect on the charges

  8. - - - - - - - - What happens if another cell is added the other way to the others? Adding pd in the opposite direction makes the pushing effect on the charges less

  9. - - - - - - - - What happens if another bulb is added? Adding a bulb adds resistance to the flow of charge

  10. - - - - - - - - - - - - - - - - What happens if both cells are turned around? The pd pushes the current the other way but the brightness of the bulbs remains the same.

  11. Question 1 Using the equation for current (I) we can work out that 3Amps of current will be flowing - - - - - - - - 6V battery Adding resistors in series is dead easy- the total resistance is now 6 Ohm 3A 2 Ohm 4 Ohm Equations V = I x R I = V/R R = V/I Divide the voltage by the total resistance and type your answer with units in the box

  12. 12V battery - - - - - - - - Question 2 1A Work out the total resistance of the circuit and a value for R R R Equations V = I x R I = V/R R = V/I Total Resistance = Value for R =

  13. - - - - - - - - Question 3 12V Equations V = I x R I = V/R R = V/I 3A A I = 12/4 = 3A 1 Ohm 3 Ohm V V V V Notice that the circuit is NOT affected by the meters and the resistors are still in series pd across the 1 Ohm resistor pd across the 3 Ohm resistor

  14. Rules you should remember and be able to use:- Current is the same through all the components Voltage is shared out across the components The resistance of components adds together Potential difference = current x resistance volts = amps x ohms

  15. answers Question 1 1Amp Question 2 Total Resistance = 12/1 = 12 Ohms If the resistors are both the same then R = 6 Ohms Question 3 PD across 1 Ohm resistor = 3 Volts PD across 3 Ohm = 9 Volts

  16. END

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