Electricity

What is a electrical circuit
& how does it work?

There are 2 main types of circuits

Series circuits

all of the loads are line up in a series

Parallel circuits

all of the loads are line up in parallel to each other

Electrical circuit is a path or many paths that let electrons to travel to the load(s) and back from the power source.

Electrical calculation formulas

To find Power/wattage through knowing the amount of Energy and Time

P = E/t

To calculate the potential difference (Voltage)

V=E/Q

To calculate the electricity cost of anything

Cost = power (Kw) x hr. x price

Calculating efficiency.

Eff = output energy/ input energy x 100

Calculating the current through knowing the charge and time

I = Q/t

Calculating the resistance through knowing the voltage and current

R = V/I

Static electricity

A stationary electric charge, typically produced by friction, which causes sparks or crackling or the attraction of dust or hair.

Circuit Diagram symbols

Ammeter

Conducting wire

Cell

Switch

Lamp

Resistor

Fuse

Voltmeter

Electricity vocabulary/symbols and unit of measurements

Neutrons

Neutrons are inside the nucleus of atoms with protons

Electrons

Electrons orbit around the neutrons and protons.

Protons

Protons are inside the nucleus of atoms with neutrons

Resistance

Resistance measures the opposition to current flow in an electrical circuit.

Unit of measurement: Ω (ohms)

Symbol: R

Watts

Watt is a unit for the rate at which energy is generated or consumed.

Unit of measure

1 Watt = 1 Joule/second

Unit of measurement: W

Symbol: P for power

Joule

1 Joule/second = 1 watt

Joule is a unit of energy

Unit of measurement = J

Symbol: E

Volts/voltage

Unit of measurement: V

Volt is the potential energy difference per unit of charge. Specifically, the energy a coulomb has before compare to after the load.

Symbol: V

Currents

Symbol: I

Current is the amount of charge that passes through a point in a wire every second.

Unit of measurement is Ampere (A)

Charge

Charge is measurement. Its calculation symbol is Q

Physical property that causes the object to have either positive or negative charges.

Unit of measurement is coulomb (C)

Time

Symbol: t

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.

Time is measure in second

Efficiency

Symbol: Eff