1 / 18

Electricity

Electricity. Current Voltage Resistance Current, Voltage, Resistance characteristics AC DC Plugs Earth Fuses Power. Current. Current is the amount of charge flowing past a point in a given time Current (A) = Charge (C) / time (s) Current read by an ammeter – connected in series.

nan
Download Presentation

Electricity

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Electricity Current Voltage Resistance Current, Voltage, Resistance characteristics AC DC Plugs Earth Fuses Power

  2. Current • Current is the amount of charge flowing past a point in a given time Current (A) = Charge (C) / time (s) Current read by an ammeter – connected in series

  3. Potential Difference • Voltage • Potential difference is the energy given to or given by a charge when it passes a component. PD (V) = Energy (J) / Charge (C) PD is taken by a voltmeter and is connected in parallel with the component.

  4. Resistance • Resistance is the volts per amp for a component. • How many volts are needed to push a current of so many through a component. Resistance (Ohms) = PD (V)/ Current (A)

  5. Circuit models • Circuit diagrams • Resistor models

  6. IV Characteristics • Resistor • Bulb • Diode

  7. Resistors • Thermistor • LDR

  8. review

  9. Mains Elec • PHET • AC DC • Period and frequency

  10. Plugs

  11. Fuse • A Fuse is a piece of wire with a low melting point • If there is a fault in the electrical appliance and the current goes up it could damage the wiring in the appliance • But if a fuse is installed, this will melt (or “blow”) and break the circuit • So a fuse is used to protect the appliance – not necessarily to protect us from electric shock

  12. Earth • What on Earth does it do? • V d G

  13. Earth • No Earth – No Fault

  14. Earth • No Earth - Fault

  15. Earth • Earth – no Fault

  16. Earth • Earth - Fault

  17. Power • Power = work done / time taken • Lifting stuff

  18. Electrical Power • Electrical power is the electrical work done in a given time. Power (W) = current (A) x voltage (V)

More Related