U2 study cards

vocabulary for science

proton

proton

This is the positive particle found inside an atom

magnetic domains

These are what line up at the atomic level in order to make a material magnetic

ferromagnetic

any material that attracts iron or materials containing iron

neutron

The neutral particle found in the atom

magnetic field

a region around a magnetic object where another magnetic object would experience a push or pull

current

This is the rate at which electrons pass a given point per second

electric field

this is the region around a charged object that another charged object would experience a push or pull

voltage

This is the ¨push¨ behind the electrons in a circuit that can be produced using a battery

static electricity

This is the buildup of charges that are stationary on the outside of objects

electromagnetic

This is a coil of wire wrapped around a soft iron core that acts like a magnet when an electric current is applied

ampere (amp)

The unit for measuring current

resistance

This is what is created when electrons rub against the atoms in the wires of a circuit

ohm

The unit for measuring electrical resistance

electromagnetic induction

The process of making electrons move in a coil of wire by either moving a magnet near the coil of wire or moving the coil of wire near a magnet

electron

The negative particle found in the atom

what happens to the magnetic field of an electromagnet when the current flowing through it is reversed?

The magnetic field reverses

The electric motor converts…

electrical energy into kinetic energy

Which part of the electric motor reverses the current quickly to allow the motor to keep spinning?

Commutator

The electrons are..

attracted to the nucleus

Magnetic strength of a magnet is always strongest at where?

The poles

reversing the current in an electromagnet will…

reverse the poles of the magnetic field

opposite charges will _______ and alike charges will _____.

attract repel

Your hair _____ _________ when rubbed by the balloon.

loses electrons

more loops create a stronger ________ _____.

magnetic field