Science - Electric Circuits

It provides energy to move charges around a circuit

It completes a circuit when closed

It converts electrical energy to light energy

It converts electrical energy to sound energy

It converts electrical energy to kinetic energy

It slows down moving charges in a circuit

It is used to control current by varying the resistance in a circuit without interruption

It is used to measure current in a circuit

It is used to measure the voltage (potential difference) across a component

It is used to measure resistance in a circuit

It allows current to flow in one direction only

It gives off light when current flows through it

It is a light controlled variable resistor that changes resistance in response to light

This is a measure of the number of electrons flowing along the wire

The amp and its symbol is the letter A

Using an ammeter

Heating eg. in kettles and heaters

Magnetic eg. in electromagnets

Chemical eg. in the electrolysis (splitting) of water

This is a measure of how difficult it is for an electric current to pass through a substance

The ohm and its symbol is Ω

Using an ohmmeter

This is a measure of the ability of the electrons to do a particular task

Volts and its symbol is the letter V

Using a voltmeter

This is when the components are connected in a single loop

They will go out

This is when the components are connected in different branches

They will stay lit

This states that voltage is directly proportional to current at a constant temperature

This means that when one doubles, so does the other

It can be verified by showing that a graph of one against the other gives a straight line through the origin

Current = Voltage ÷ Resistance