- With symbols, this would be:
- To find out the voltage, current or resistance, we need to put in an ammeter or voltameter
- This is an ammeter and this is to measure the current. This is measured in amps. The flow of electrons that are travelling through the wire is from positive to negative. (+)-->(-)
- This is a voltameter which measures volts. This is the voltage. The push of electrons. The electrons from from negative to positive. (-) --> (+)
- V=Voltage--> V=IxR
I=Current--> I=V/R
R=Resistance--> R=V/I
|
\/
measured in Ohm's (Ω)
- This is similar to Ohm's Triangle but it's called Ohm's Law. With Ohm's Law, you can also figure out the power and there are other ways to figure out the current, voltage and resistance.
- These are the power Lines. The wires is the power that is supplied to our homes through the National Grid.
- These signs are found by things that can kill by electrocution e.g Power Lines
- The plastic casing on a plug prevents electrocution.
If the Live wire becomes loose and touches the plastic casing, the casing has now become a "live casing." Touching this can kill by electrocution.
- A fuse is a thin piece of wire which will melt when too much current passes through.
E.G: A 3A fuse will melt when a current greater the 3A passes through.
- Consists of a cell, iron nail and wire.