Topic 11a Energy & Electricity Flashcards
What is electricity?
It is a type of energy
Key Words : Electrochemical cell
It changes the energy in chemicals - into electricity
Key Words: Battery
A sourceOf stored energyThat is made of one or more cells
Key Words: Switch
Something that controlsThe electricityIn an electric circuit
Key Words: Electrical Circuit
A system That provides a pathFor the transfer of electricity
A battery has two ends - what is different about the two ends?
One side is positiveThe other side is negative
How does a torch use energy?
By changing electrical energy into light energy (and some heat energy)
What has happened to make a battery flat?
All the energy in a cell has been transferred.
Can you recharge a battery? If yes, how?
Yes but you must buy rechargeable batteries. By plugging them into and electrical point.
Why must we dispose of old batteries carefully?
Because they contain harmful chemicals
Why should you never put batteries in a fire?
They can explode.
Electrical energy is transferred in a …..
Circuit
Describe how a circuit works by using a torch a an example.
The parts of the torch that carry the electricity are joined together in a LOOPIt begins and ends at the battery
What is the function of the circuit
To take the electrical energy from the energy sourceTo where it is needed
Why do some electrical appliances not work?
Because the electrical circuit could be broken
