Energy and Electricity Flashcards
Voltmeter
A device used to measure potential difference or voltage. A voltmeter is connected in parallel to the component.
Ammeter
Used to measure the electrical current and must be in series.
Current in an electrical circuit is a measure of the flow of electrons at a point per second.
Conductor
A material which allows charge to move through it easily.
Insulator
A material that does not allow charge or heat to pass through it easily
Electron
Sub atomic particle which flows through a circuit carrying a negative charge
Ohms
Unit of electrical resistance
Potential Difference- what is it and how do you measure it?
Measures the difference in energy between two parts of a circuit. Measured in Volts. Voltmeter is used to measure Potential Difference and must be in parallel
Series Circuit- what happens if one component breaks?
None of them will work
Series Circuit- is the current always the same?
Yes, the current is always the same no matter where you put the ammeter
Parallel Circuit- what happens if one component breaks?
The components on different branches will keep working, but components on the same branch will not
Energy transfer
Changes from one form of energy to another form of energy.
Conservation of energy
Energy cannot be created or destroyed. It can be stored, dissipated or transferred from one form into another.
Internal energy
Energy stored in all materials, including energy due to the motion of particles and the forces between them.
Kinetic energy
Energy which an object possesses by being in motion.
Elastic potential energy
Energy stored in squoooshed, streetched or twisted materials.
Gravitational potential energy
the energy stored by an object lifted up against the force of gravity. Also known as GPE.
Thermal energy store
This energy store filled when an object is warmed up.
work done
work is done when a force makes an object move a distance, and energy is transferred.
Power
The rate of work done. Or the energy transferred per second.
Fossil fuel
Natural, finite fuel formed from the remains of living organisms, e.g. oil, coal and natural gas.
Non-Renewable
A source that cannot be replaced when it is used up, such as natural gas or cold.
Renewable
An energy resource that will not run out, e.g. solar energy and wind energy.
