Electricity

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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