Electricity and Circuits

Electricity Electrons are negatively charged particles, which transfer energy through wires as electricity.As energy flows through a wire or other conductive material, electrons react with the ions in the wire to transfer energy by force.This allows the energy to be passed on, in a stream of electrons called a current. In a direct current, electrons move in one direction only. In an alternatingcurrent, electrons change direction continuously.Current through a component depends on the resistance of the component and the potential difference of the component. The potential difference is also known as the voltage, and is measured using a voltmeter.A way to measure the potential difference is using the current and resistance.V = I x Rwhere potential difference (V) is measured in volts (V), current (I) is measured in amps (A), and resistance (R) is measured in ohms (Ω). Common Electronics Terms Match the term wit the explanation A Alternating Current D Direct Current LED Light Emitting Diode Parallel Circuit Equal current flows through all LED's/ Components Series Circuits LED's are usually brighter depending on where they are placed in the circuit. Electric Circuits Energy flows around a circuit as a current.Different parts of the circuit, called components, have different properties that allow them to control,use, or change the current. Common circuit components are represented in the image below. Symbol Sorting Sort the components based on their function in a circuit. Switches Resistors Diodes Meters Question 2: Definition matching Match the definitions with the corresponding components. Lamp A filament is heated by the current to give out light Fixed resistor Restricts the flow of an electric current, with a fixed amount of resistance Variable resistor Restricts the flow of an electric current, with a variable amount of resistance Semi-conductor diode Allows current to flow in only one direction Ammeter Used to measure current Voltmeter Used to measure resistance Circuit drawing Draw the circuit diagram for a circuit which lights three LEDs in series. You can click the star icon above the drawing for straight lines and shapes.