current electricity science

What is current electricity?

Controlled flow of electrons through a conductor

What is an electric circuit?

Continuous path in which electrons can flow

What do electric circuits have?

Energy source conductor load switch

What is energy source?

Where electrons come from like battery?

Conductor

Where electrons flow through like wires

Load

Changes electric energy to kinetic energy or something useful like a lightbulb motor

Switch

Controls the flow of electrons on one circuit is closed off when circuit is open

What is electrical energy?

Energy that is made by the flow of electrons and electric circuit measured in joules

What is the current? How to calculate

How fast do electrons are travelling measured in amps calculated by number of charges Coulomb divided by time seconds

Measure and current

An in metre is a device used to measure electric current unit ampere

Direct current

Direct current DC flows in one direction through an electric circuit type of current coming from a cell or battery

Alternate current

Alternating current AC is a flow of electron the alternates and directions in an electric circuit type of current that comes from electrical outlets

QIT, what do each stand for?

Q stands for charge T stands for time I stand for current

Voltage or potential difference

Electrons leave negative set of battery energy to load return to positive side regenerate potential difference is the difference in energy between two points in a circuit

Where must a volt metre be connected?

Voltmeter must always be parallel to a load or energy source

What does VEQ stand for?

V is potential difference measured in volts E is energy measured in joules Q is charge measured in coulombs

Resistance

Disability of a material to slow down the flow of electric cart represented by the symbol, R or measured in ohms

Four key factors that affect resistance

Type a material, some substances, resist electrons flow more than others cross-sectional area the dinner a wire, the glitter it’s a resistance will be flat the longer a wire the greater resistance will be temperature the warmer the wire the greater it’s resistance will be

What is a resistor?

Device that slows/reduces the flow of electric crate

What is a series circuits

Only has 2 path for electrons to follow all loads must be on and working at the same time

What haooend when more loads are added to a circuit

They Will receive less current and bulbs will get dimmer

Parallel circuit

Circuit that’d has 2 or more paths for current to flow each loads receive a electric current along separate pathway s so each will work even when some stop