Electricity
Electricity vocabulary/symbols and unit of measurements
Efficiency
Unit of measurement: %
Symbol: Eff
Time
Time is measure in second
Time is the continued sequence of existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future.
Symbol: t
Charge
Unit of measurement is coulomb (C)
Physical property that causes the object to have either positive or negative charges.
Charge is measurement. Its calculation symbol is Q
Currents
Unit of measurement is Ampere (A)
Current is the amount of charge that passes through a point in a wire every second.
Symbol: I
Volts/voltage
Symbol: V
Volt is the potential energy difference per unit of charge. Specifically, the energy a coulomb has before compare to after the load.
Unit of measurement: V
Joule
Symbol: E
Unit of measurement = J
Joule is a unit of energy
1 Joule/second = 1 watt
Watts
Symbol: P for power
Unit of measurement: W
1 Watt = 1 Joule/second
Unit of measure
Watt is a unit for the rate at which energy is generated or consumed.
Resistance
Symbol: R
Unit of measurement: Ω (ohms)
Resistance measures the opposition to current flow in an electrical circuit.
Protons
Protons are inside the nucleus of atoms with neutrons
Electrons
Electrons orbit around the neutrons and protons.
Neutrons
Neutrons are inside the nucleus of atoms with protons
Circuit Diagram symbols
Voltmeter
Fuse
Resistor
Lamp
Switch
Cell
Conducting wire
Ammeter
Static electricity
A stationary electric charge, typically produced by friction, which causes sparks or crackling or the attraction of dust or hair.
Electrical calculation formulas
Calculating the resistance through knowing the voltage and current
R = V/I
Calculating the current through knowing the charge and time
I = Q/t
Calculating efficiency.
Eff = output energy/ input energy x 100
To calculate the electricity cost of anything
Cost = power (Kw) x hr. x price
To calculate the potential difference (Voltage)
V=E/Q
To find Power/wattage through knowing the amount of Energy and Time
P = E/t
What is a electrical circuit
& how does it work?
Electrical circuit is a path or many paths that let electrons to travel to the load(s) and back from the power source.
There are 2 main types of circuits
Parallel circuits
all of the loads are line up in parallel to each other
Series circuits
all of the loads are line up in a series
