Peka Science Year 5

Date	:	20-4-2010
Activity Code	:	5 /2 / 2.2 / 6
Theme	:	Investigating Force and Energy
Topic	:	2  Electricity
Learning Outcomes	:	2.2.6 Compare the brightness of the bulbs in a series and a parallel circuit.
Aim	:	To investigate the relationship between the types of  circuit and the brightness of the bulbs
Apparatus	:	Battery holder,  2 bulbs with holders, 2 batteries, wires with crocodile clips, switch, A4 paper
Method	:	1. Draw a series circuit and a parallel circuit diagram      in A4 paper. 2. Build a series circuit and  a parallel circuit according      to the diagrams that you have drawn. 3. Switch the circuits on. 4. Compare the brightness of the bulbs between the     two circuits. 5. Observe and record your findings.
Observation	:
Types of Circuit Brightness of the Bulbs Series Circuit dimmer Parallel Circuit brighter
Discussion	:
1. Which circuit has brighter bulbs?     Parallel circuit . 2. Give an inference based on your observation. In a parallel circuit,each components has the same voltage across its terminal, the electric flows is divided among its parts. 3. Give a hypothesis for the experiment.     If the types of circuit is parallel circuit, then the brightness of the bulbs is brighter. Conclusion   :    The bulbs in a parallel circuit are brighter than the bulbs in a series circuit.