Current Electricty

The flow of electrons in a wire

A continuous loop (usually metal) that is needed for electrons to flow in order for electricity to flow

Potential difference : the amount of force with which the battery can push electrons

Negative side , around circuit, back to positive

Slow down the flow of current, turns electrical energy into heat energy Eg thin wire in a bulb

All the current that flows through one bulb also has to flow through the other - a continuous loop. If one bulb fails, the other won’t light

The current flowing in the circuit is split between both bulbs. Eg headlights

From positive to negative , although it’s not acc like that

Allow electricity to flow through themselves eg metal

Do not allow electricity to flow through themselves

In parallel with the component (bulb)

Triangle : Voltage on top Current (|) and Resistance (R) on bottom

For a metallic conductor at constant temperature the current is directly proportional to the voltage

A device that allows current to flow in one direction only.

The one with the triangle

Light dependent resistor : changes resistance with the amount of light falling on it At low light , resistance is high. Used in street lights

A resistor whose resistance can be changed by changing its temperature When cold, resistance is high Used in fire alarms, fridges

The amount of electrical energy converted to other forms in one second

Watt (P)

Wattmeter

Power = voltage x current (|)

Amps (A) but the symbol is |