Electricity & Magnetism
temporary magnet made by wrapping a wire coil
What is electromagnet
device that uses an electromagnet to measure electric current
What is galvanometer?
the acculation of excess electric charge of an objecft
What is static electricity?
The type of magnetism that iron nails get when they are magnetised by a permanent magnet
What is induced magnetism?
tendency for a material to oppose electron flow
What is resistance?
What is the device that uses electromagnetic induction to increase or decrease the voltage of an alternating current
device that converts electrical energy to mechnical eneregy
a device that protects a circut
What is a circut breaker?
The direction of conventional current and electron flow
What is positive to negative and negative to positive
The force of attraction or repulsion
What is electrical force?
large wheel that rotates when pushed by steam, wind, or water
turbine
What is direct current?
A circut that provides two or more paths
What is a parrallel circut?
The rule used to predict the direction of a forceon a current-carrying conductor
What is Fleming's left hand rule?
electric charge
What is an electrical property of matter that creates a force between objects?
properties and interactions of magnets
What is magnetism
electric current that reverses its direction of flow in a regular pattern
What is alternating current
A circut where there is only one path
What is series circut
The three ways available to demagnetise a permanent magnet
What is hammering the magnet, placing the magnet in a coil with an alternating current and taking it out slowly and heating the magnet?
This is the physical component of a light bulb
What is a filament?
wire wrapped into a cylindrical coil
What is magnetism
related to the force that causes electric charges
What is voltage difference
A device that uses electromagnetic induction to convert mechanical energy to electrical energy
What is a generator?
These devices are used to allow current to flow to and from the coil of an a.c motor or generator
What are slip rings?
Ohm's Law
What is a law that states the current in a circuit equals the voltage ?