- conductors carry charge like pipe carries water. The flow of charge is called elected current.
- the total amount of charge moving through a conductor divided by the time it takes to get past a point is how u calculate the current. It is calcated in amperes.
- a current measuring device is called an ammeter.
- an ammeter measures the by taking energy fronthe negative wire and giving it to a load through a positive wire and finall returning back to he power source. That is also how a complete circuit works.
- an electric charge has a certain amount of electrical potential energy.
- a voltmeter measures the difference of potential energy before and after it has been delivered to the load.
- a voltmeter is a heavy resistor so it can measure minimal current from the circuit.
- electrical energy always originates from other forms of energy.
- the conversion of other type of energy in to electrical potential energy can be done by many devices.
- instead of drawing diagrams for circuits, we use schematic drawings to easily understand where the current is going through.
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