# Series and Parallel Wiring

```Series and Parallel Wiring
Aim: To investigate different ways of wiring light bulbs.
Series and Parallel Wiring
Aim: To investigate different ways of wiring light bulbs.
Method 1:
Wire up the circuit in the diagram.
Remove one of the light bulbs.
Add in another light bulb between the first two.
Results 1:
What happens when a bulb is removed?
What happens to the brightness of the bulbs when
Method 2:
Wire up the circuit in the diagram.
Remove one of the light bulbs.
Add in another light bulb, wired the same way as
the first two.
Results 2:
What happens when a bulb is removed?
What happens to the brightness of the bulbs when
Method 1:
Wire up the circuit in the diagram.
Remove one of the light bulbs.
Add in another light bulb between the first two.
Results 1:
What happens when a bulb is removed?
What happens to the brightness of the bulbs when
Method 2:
Wire up the circuit in the diagram.
Remove one of the light bulbs.
Add in another light bulb, wired the same way as
the first two.
Results 2:
What happens when a bulb is removed?
What happens to the brightness of the bulbs when
Conclusion: What differences are there between the 2 ways of wiring?
Conclusion: What differences are there between the 2 ways of wiring?
Questions:
1. Draw a circuit diagram of 5 bulbs in series for Christmas tree lights. What
is the problem with using parallel wiring in Christmas tree lights? What is
the problem with using series wiring in Christmas tree lights?
2. Draw a circuit diagram for 2 headlights and 2 tail lights for a car, with all
of the lights in parallel. Why would series wiring not be suitable for car
lights?
3. Draw a circuit diagram for a hair dryer. It needs a fan (use a circle with a
fan in it for a symbol) and a bulb in series, with 2 heating elements (use
resistor symbols) and 2 switches so that the fan can work with one or
both heating elements.
Questions:
1. Draw a circuit diagram of 5 bulbs in series for Christmas tree lights. What
is the problem with using parallel wiring in Christmas tree lights? What is
the problem with using series wiring in Christmas tree lights?
2. Draw a circuit diagram for 2 headlights and 2 tail lights for a car, with all
of the lights in parallel. Why would series wiring not be suitable for car
lights?
3. Draw a circuit diagram for a hair dryer. It needs a fan (use a circle with a
fan in it for a symbol) and a bulb in series, with 2 heating elements (use
resistor symbols) and 2 switches so that the fan can work with one or
both heating elements.
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