Question 14
In this task, you will make and test predictions about the flow of current in a circuit. Work as a whole class.
You will need: a power supply or battery, wires longer than 2 metres, or many short wires that can be connected end to end, 4 identical lamps that can operate in series from the power supply.
1 Make a circuit with one lamp close to the negative terminal of the power supply.
2 Place the next lamp several metres away from the first lamp, and another lamp a similar distance from this lamp.
3 Place the fourth lamp close to the positive terminal of the power supply.
Do not switch on the lamps yet.
Discuss these questions as a whole class.
What will happen when the power supply is switched on?
Will all the lamps come on at the same time?
If not, in what order will they light?
You will need: a power supply or battery, wires longer than 2 metres, or many short wires that can be connected end to end, 4 identical lamps that can operate in series from the power supply.
1 Make a circuit with one lamp close to the negative terminal of the power supply.
2 Place the next lamp several metres away from the first lamp, and another lamp a similar distance from this lamp.
3 Place the fourth lamp close to the positive terminal of the power supply.
Do not switch on the lamps yet.
Discuss these questions as a whole class.
What will happen when the power supply is switched on?
Will all the lamps come on at the same time?
If not, in what order will they light?
