Physics- Grade 9 electricity

Electricity

The set of physical phenomena associated with the presence and motion of matter that has a property of electric charge.

Parallel circuit

A circuit that has more than one pathway for electrons to follow.

Series circuit

A circuit that has a single pathway for electrons to follow.

Electric charge

The ability of electric charge to move, which is essential for the utility of electrical energy.

Static electricity

The buildup of positive or negative charge on materials.

Current electricity

The energy of steadily moving electric charge, used by electric devices such as lamps and computers.

Circuit

A pathway for electrons to follow, allowing the flow of electric current.

Resistance

A measure of how much an object opposes the flow of electric current.

Equation of voltage is?

V= e/q units

Equation of current is?

I= q/t rate

Energy mass

it has no mass

Type of energy in a battery

chemical energy

Electrodes

conductors

electrolytes

solution with ions

primary battery

only one use

secondary battery

can be reused like phone battery

Fuel cells

chemical reactions for energy

Hydrogen fuel cell

H and O combine and make energy

DC

Moves in one way

AC

Moves both ways

Electrical energy

can not be found in nature

(A)

Amperes unit

Fuses

can cut off electric flow if too high. Only once

Cricut breakers

can cut off electric flow if too high. more then once

voltmeter

measures the load through specific load

Resistor

ability to appose the electric current

Unit Ohms

resistors

what effects resistance

too hot, too long, small cross section area, insulators/ materials

resistors use what to make current slower

energy, all loads are resistors