electronics 1 revision for theory

what is an electrical current?

flow of negative charge to negative to positive

what is conventional current?

Flow of positive charge from positive to negative

what is an insulator?

a non-conductive material, that contain little to no free electrons. therefore, they are unable to conduct an electric charge.

what is the unit for electric current?

amperes or amps

what are smaller amounts of current measured in?

milliamps

what symbol is used to represent Amps?

A

what symbol is used to represent milliamps?

mA

What is voltage?

the electrical force that drives current around a circuit

What is the symbol used to represent volts?

V

What is power in regards to electronics?

Converting energy from one form into another. i.e. electricity from the toaster being used to conduct heat. one form of energy to another.

what is the term and symbol used to represent power?

Watts and W

what is the formula to find the power of an electrical circuit?

Power = Current x Voltage

what is ohms law

the current through a conductor between two points is proportional to the voltage across the two points and inversely proportional to the resistance of the conductor. It is commonly expressed as V = I × R.

what is the formula to find the voltage of a circuit?

V = Current x Resistance

what is the formula to find the current of a circuit?

I = Voltage / Resistance

what is the formula to find the resistance of a circuit?

R = Voltage / I (amps)

What unit is used when measuring resistance?

Ohms

what is a series circuit?

A circuit that has only one path for the elecric current to flow.

what is the formula for finding the resistance of a series circuit?

you add the resistance values together.

where does current change in a series circuit and why?

the current in a series circuit doesnt change. it is the same throughout the entire circuit. it is like this because there is no point of which charge can leave or enter the circuit.

in a parallel circuit, how can you find the different voltage of each component?

there is no need to as the voltage is the same value across all components. so, if you know the voltage for one component you know the voltage for all the compnents in that parallel circuit.

what is a mixed network?

a circuit that contains both series and parallel circuits.

what is a digital signal

a digital signal converts data into binarynumbers, represented as discrete values, typically 0s and 1s. the information is displayed by square waves which effectively represents binary waves.