Physics Electricity GCSE EDEXEL

what is current

the rate of flow of charge

what is voltage

the energy per unit charge

what is resistance

How hard it is for current to flow through a component

formula for current

formula for voltage

formula for resistance

formula for adding resistance

a ammeter

a voltmeter

a thermistor

a resistor

a lamp

a bulb

a led

a diode

a variable resistor

a battery cell

a battery

a ldr

a closed switch

a open switch

a heater

a buzzer

structure of metals

they have positive ions and delocalised electrons

ohms law

Ohm's law states that the potential difference across a conductor is directly proportional to the current passing through it, provided the temperature remains constant

what is a series circuit

Components are connected in a single loop; if one component breaks, the entire circuit stops working.

what is a parallel circuit

Components are connected in separate branches; the current splits, and components can operate independently.

what happens to the voltage/current in a series circuit

In a series circuit, the current is the same everywhere, while the voltage is shared among the components.

what happens to the voltage/current in a parallel circuit

In a parallel circuit, the voltage is the same across all branches, while the total current is split among them

coulomb heating

electrical energy is converted to thermal energy as charge flows through a component with resistance, causing the component's temperature to increase.

what is so special about diodes

diodes are polarised, meaning they are one-way round

The resistance is very high in reverse bias

Forward bias results in a lower resistance