Electric And Normal Magnets Definitions Flashcards
What is force
When you pull or push something.forces occurs all the time
Eg 🔷when blood pumps around in you’re body
🔷when you write you use force to push you’re pen on paper
What is contact force
a force that acts only between objects that are touching
Eg🔷when you hit something or when something hits the ground
What is gravity
the force of attraction that exists between any two bodies in the universe
Eg🔷 when you stand you stay on the ground other than flying off or when you drop a tennis ball, it speeds up as it falls through the air because of the force of gravity pulls it towards the Earth
What is a non-contact force
a force that acts between objects even though the objects are not touching
Eg🔷 Gravity and weight
What are magnetic forces
the force that acts between magnets
Eg🔷when you hover one or more magnets above another they stick
What is a electrostatic force
a non-contact force of electric charges at rest.
Eg🔷The electricity that builds up on plastic rulers, balloons and the Van de Graaff generator
What is a permanent magnet
a magnet that retains its magnetic effect for many years
Eg🔷 iron,nickel and colbolt which are a natural permanent magnet and alloys
What are alloys
a mixture of a metal with a non-metal or another metal
What is a temporary magnet
a magnet that stays magnetic only while it touches a permanent magnet and when they are separated they lose there magnetism
Eg🔷 paperclips
What is the North Pole
the end of the magnet that, when free to rotate, points to the North Pole
What is a South Pole
the end of the magnet that, when free to rotate, points to the South Pole
What is relpolsion
an opposing force
Eg🔷 when two north or south sides of a magnet brought together they repel from each other which is called repulsion
What are domains
Small mini magnets are called domains if they face the same direction they will act as a magnet
What is a magnetic field
a map of lines showing the size and direction of a magnetic force.
What are atoms
a very small particle that makes up all things
What is a nucleus
roundish structure inside cells that acts as the control centre for the cell.
What are electrons
very light, negatively charged particles inside an atom.
What is a negative electric charge
the charge on an atom or object with more electrons than protons
What are protons
tiny, but heavy, particle found in the nucleus of an atom.
What is a positive electric charge
the charge on an atom or object with fewer electrons than protons
What are neutrons
tiny, but heavy, particles found in the nucleus of an atom
What does neutral mean
having the same number of protons and electrons
What does static electricity mean
a build-up of charge in one place
What is an insulator
materials that do not allow electric charge to flow through them
Eg🔷 through rubber and air
