Science 4th grade | UNIT 5: Electricity and magnetism 5.2 Components and a simple circuit
Components
The bulb and the cell in a torch are each a component of a circuit.
You may have used these electrical components in Stage 2
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Activity 5.2 (Making a simple circuit)
You will need: a cell - a bulb in a bulb holder - wire scissors or wire cutters - a knife or wire strippers - tape 3 mm screwdriver
Cut the wire to make two lengths of 15 cm.
Strip the plastic coating from the ends of the wires with the knife or wire strippers until 2 cm is bare at all ends.
Look at the diagram. Predict what will happen to the bulb in this circuit.
Make a circuit with one cell and one bulb as shown in the diagram. Observe the bulb. Predict what will happen to the bulb if you break the circuit by removing the tape and wire from one end of the cell. Now break the circuit. Observe the bulb.
Safety: Be careful with the knife. Always strip away from you
Questions
1) What happened to the bulb in your completed circuit?
Explain why this happened.
2) What happened to the bulb when you broke the circuit? Explain why this happened.