AGK Electrics ( chapter 2 > required skills and knowledge )

The unit of electrical potential difference is …

The volt ( v )

The unit of current

The amp ( I ) ~ describes the amount of charge flowing per second

Direct current ( DC ) is …

Is current which flows in only one direction

Alternating current ( AC ) is …

Reverses flow direction many times per second

Ohms law describes the relationship between what?

1. Potential difference

2. Current

3. Resistance

   example ~ V = I R

Electrical potential difference is

The difference between two sets of charge resulting in a electromotive force ( EMF ) which causes the current to flow

Electrical current can flow between an object or region with a …

1. Positive charge

2. Negative charge

Electrical resistance is …

Is the resistance to electron flow created by materials comprising the closed circuit

Poor conductors will …

Resist current flow

does all elements of a circuit have resistance?

Yes

Disadvantages of series circuit

Is that the failure of one resistive load breaks the circuit. Putting the entire circuit out of action.

What is electrical power

1. Is the rate at which energy ( joules ) is pushed through a circuit.

2. The unit for electrical power is ~ watt ( W )

Electrical current is …

The flow of electric charge out time unit and is measured in Amperes ( A )

Electromotive force is measured in …

Volts ( V )

Is current proportional or inversely proportional to electromotive force

Directly proportional

Resistance is inversely promotional or proportional to the cross section area

Inversely proportional