what is an electron?
a particle of an atom which have a negative electric charge
what is current?
the flow of electrons through a conductive material
what is an electrical network?
arrangement of connected electrical or electronic components
what is capacitance?
ability of a circuit or component to store electrical charge
what is a magnetic field?
area surrounding a magnet where magnetic forces are observable
what is magnetic flux?
total magnetic field that passes through a given area
what is magnetic flux density?
amount of magnetic flux that passes through a given area at the right angles to the magnetic field
How do magnetic forces travel?
from the north to the south pole
what is a multimeter?
a device used to take different electrical and electronic measurements, such as voltage, current, resistance and power
what is voltage?
difference in electrical potential between two points in a circuit
what is resistance?
opposition to the flow of electrical current
what equation links voltage, current and resistance?
Voltage = Current X Resistance . Known as Ohm’s law
what is the difference between AC and DC current?
DC is typically low voltage and can only flow one direction but AC is high in voltage and changes direction periodically
What is a potential divider?
circuit arrangement that uses two resistors connected in series to divide the initial supply voltage, resulting in smaller output voltage
what is a phasor diagram?
a diagram used to show the relationship between two or more sine waves with the same frequency
what is overcurrent?
when the safe load current for a circuit is exceeded
what is a digital signal?
two states - high/low, on/off, 1/0
what is an analogue signal?
continuous signal in a wave shape, huge variety of levels
what is a semiconductor?
materials that conduct current better than insulators but not as well as conductors
what is the difference between P and N semiconductors?
N-type have an excess of electrons but P-type have an excess of holes where electrons can travel to.
what are logic gates?
digital devices that produce either high or low output depending on the signal recieved.
what are the different logic gates?
AND 1-1 = 1, OR 1-0/0-1/1-1 =1, - NAND 0-0/1-0/0-1 =1, NOR 0-0 = 1
