Changing Circuits
Website link: http://www.bbc.co.uk/schools/ks2bitesize/science/physical_processes/changing_circuits/play.shtml
Q: Make a circuit with one very brightly lit bulb that can be turned on and off.
The circuit consist of choice of two types of battery, which is 1.5Volt or 3.0Volt, normal wire or twisted wire, choice of one bulb or two bulb and ON/OFF switch.
The bulb brightness depends on the battery voltage, if you put 1.5Volt battery the bulb is less bright. If you put 3Volt battery the bulb will be brighter. The reason, because with 3Volt the current flow is higher. Current is equal to voltage divided by resistor.
Assume the bulb resistor is two ohms
Therefore,
I = V/R = 3/2 = 1.5 Amps
I = V/R = 1.5/2 = 0.75 Amps
I = Current, V = Voltage and R = Resistor
So, according to ohms laws, the higher the current, the brighter the light.
Q1: Can you make the light bulbs working and see the difference if you put 1.5Volt battery or 3.0Volt battery.
Q2: Why do you think the light is not ON if you put the switch to OFF?
Q3: Why do you think that the light brightness is the same when you use normal wire and twisted wire?
Done By Group:
Haji Roslan --> 10D0005
Nor’izman --> 10D0001
Concept Map: (Copied from http://cmapspublic.ihmc.us/rid=1121811339066_1756205171_2783/Electricity.pdf)
Concept Map: (Copied from http://cmapspublic.ihmc.us/rid=1121811339066_1756205171_2783/Electricity.pdf)
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