Component symbols There are lots of different components which can be used to make circuits, the ones which will often feature in National 5 Physics are shown in the table below. Component Name Cell
Battery DC Supply AC Supply
Circuit Symbol
Function Supplies electrical energy to a circuit, the longer line shows the positive side. A battery of cells means 2 or more cells.
Supplies electrical energy to a circuit in the form of a direc current. Supplies electrical energy to a circuit in the form of an alternating current.
Lamp
A lamp lights when current flows through it, converting electrical energy to light energy.
Switch
A switch allows you to complete or break a circuit.
A resistor restricts the flow of current, this may be to protect other components. A resistor, the resistance of which can be varied in the circuit, could be used for a dimmer switch.
Can be used to control a circuit. The resistance goes down as the light increases. The resistance of a thermistor will increase as the temperature increases. A fuse is a safety device – the metal core will melt when too much current is flowing in the circuit.
Voltmeter
Must be placed in parallel to measure the difference in electrical potential between two points.
Ammeter
Must be placed in series to measure the current flowing in a circuit.
Ohmmeter
Measures resistance. Must be placed in parallel with the component(s) which are to be measured.
Capacitor
Used to store electrical charge, can be used to create a simple timing circuit, or in the flash in a camera.
Diode
Only allows current to flow in one direction.
Photovoltaic Cell
Converts light energy to electrical energy, can be used as the power source in a circuit. More light will mean a greater p.d. across the cell.
LED (Light Emitting Diode)
Emits light when a current flows but only allows current to flow in one direction. Requires less energy than a lamp.
Motor
Loudspeaker
Converts electrical energy into kinetic energy by turning.
Cell Supplies electrical energy to a circuit, the longer line ... Loudspeaker Converts electrical energy into sound energy. Page 1 of 1. Component symbols.pdf.
Jul 8, 2002 - use a meter to test suspect components and troubleshoot electronic circuits. ..... The valence electron is held loosely to the atom and moves.
Classes on every level can create objects ... level might be a simple element on the next level of scale. ...... Department of Computer Science, EPFL, Lausanne,.
software components with static data and hard references, resulting in a ... aspect-oriented programming (indeed, the fragment system .... An important issue in component systems is how to ab- ... this section gives an introduction to object-oriented
Nov 9, 2006 - 2.5.1 A Brief History of Encapsulation in Software Development . . 25. 2.5.1.1. Monitors . ...... introduced and used, as-is, across a company or.
In Evensen, D., and Hmelo, C. E. (eds.), Problem-Based ... Educational Psychology Review, 16(3), 235-266. Meyer, D. K. ... REVIEWED Component #259.pdf.
