Energy Flashcards
What charge is an atom
Neutral
What charge is a proton
Positive
What charge is a neutron
Neutral
What charge is an electron
Negative charge
What are electrons
Electrons are charged particles that carry an electric current through a circuit
Nucleus
The core of an atom that contains protons and neutrons
Static electricity
Is caused by the build up of electrical charges on the surface of objects
Current electricity
A phenomenon from the flow of electrons along a conductor
Current , unit and symbol
Ampere, A
Voltage, unit and symbol
Volts and V
Resistance, unit and symbol
Ohm, omega -o-
Copper
Cheap which is why it is used for the wiring around a house.
Aluminium
More expensive but lighter which is why it’s used for high voltage transmission lines
Series circuit, advantages
- little energy is lost in the wires
- the voltage is shared equally
- easy to set up
Series circuit, disadvantages
- Globes are unable to be controlled individually with a switch
- the current stops flowing if one globe blows
- adding more globes to the circuit means their brightness will be dull
Safety switch
Detects a leak in a current and can break the circuit within 0.03 seconds
Define conductor
A material that allows a current to pass through it.
Example: copper and aluminium.
Define insulator
Material that does not conduct electricity.
Example: rubber and plastic.
Overall what is the charge of an atom
Neutral as electrons and protons are equal. If an electron gets pushed off or rubbed on this can make it either positive or negative then the atom becomes an ion
Brief of static electricity
Is caused by the build up of electrical charge on the surface of object this occurs because the surface has been rubbed against another surface.
Static electricity can leak away into surroundings, this can cause electrons to jump across gaps which then converts into kinetic energy such as heat, light, sound and motion and for example a lightning bolt.
Current electricity
Current is found in your house in things such as power points as its electrons moving along a wire. If the electrons the source will not work.
Electric current
Is formed whenever charge flows from one spot to another, this is made up of electrons moving along a wire.
Resistance
A measure oh how difficult it is for current to pass: measure ohms -o-
