Exploring Circuits
Pre-Experiment:
Aim:
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Method:
1. Construct a circuit (a) with one light bulb, a switch and a power pack.
2. Draw a circuit diagram.
3. Construct a circuit (b) with two lightbulbs in a row, a switch and a
powerpack.
4. Draw a circuit diagram.
Circuit Diagram:
Discussion Questions:
1. Was the bulb/s brighter in circuit a or b? Why?
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2. Describe four features required to construct a simple, working circuit?
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3. Recall how energy is transferred in a simple circuit.
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4. Identify the role of a switch in a circuit
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5. Complete the following, using the word bank provided:
The cell transfers ______________ to the electrons and ______________ them around the
______________ in the circuit. The wires are made of ______________ . Metal is a
______________ and lets ______________ flow through it. In the bulb, some of the
electrical ______________ is changed to ______________ energy. All the ______________
are still in the wire, but they do not have as much energy as before. The ______________ is
not used up.
There is ______________ current flowing in this circuit. It is ______________ for the
current to flow through three bulbs. This circuit has a high ______________ . You can also
increase the resistance by putting a ______________ , thin piece of wire in the circuit. It is
difficult for ______________ to flow through long, ______________ wires, so they have a
high ______________. Not much current can flow through.