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This article explores the fundamental types of electricity, Alternating Current (AC) and Direct Current (DC), and their practical applications. It highlights critical electrical functions including power supply, conduction, protection, insulation, control, energy transformation, relays, capacitors, diodes, and transistors. Each function is defined with examples to demonstrate how these components operate in circuits, enabling a better understanding of how electricity powers our daily lives through various electronic devices.
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Electronics… And more practical uses of electricity
Current types: • Alternatingcurrent (AC) • Direct current (DC)
ElectricalFunctions • 1. Power supply: • Supplies energy to the circuit • Examples: Battery, power supply, photovoltaiccell • 2. Conduction: • Ability to transferelectrons
Factorsthat affect conduction • Length: • The shorter the wire the better the conductor • Diameter • The wider the wire the better the conductor • Temperature • The colder the wire the better the conductor • Nature of the material • A metalisbetterthan a metalloid (carbon) whichisbetterthan a non-metal
3. Protection: • Elementwhose goal is to protect the circuit in case of a surcharge
Electricalfunctionscontinued • 4. Insulation: • Elementwhosefunctionis to slow down the electricalcurrent
ElectricalFunctions • 5. Control • Component that has the ability to control the flow of electricity in a circuit • Flip flop switch, lever switch, push button, magnetic switch
Defining switches • UniPolar vs. Bipolar • Unidirectional vs Bidirectional
ElectricalFunctions • 6. Transformation of energy • Any component that has the ability to transformelectricalenergyintoanotherform of energy (heat, light, magnetism, vibration)
7. Relay • Function: Elementthat uses a smallamount of power to switch another circuit whichrequires a largeramount of power
8. Condenser (Capacitor) • Function: Stores energy • Allows to even out currentfluctuations • Allows to dischargestoredenergy in one shot (e.g. camera flash)
9. Diode • Allows the current to flow in only one direction • Has lowresistance one way, incredibly high resistance the other) • ConvertsAlernatingcurrentinto direct current
10. Transistor • Function: Amplifies an electronic signal • Used in computers – binary code