science electricity test

What happens when you rub a ballon on your head what electricity has you created

static electricity

what happens when two positivly charged objects are placed next to each other what happens

they will repel each other because the same charged objects do that and only opposite attract

what is electricity

Electricity is the presence and flow of electrons

what is electric charge produced from

charged particles, electrons can move

like charges

repel

opposite charges

attract

charged objects

one charged object and one not charged object attract

what happes when positive and negative charges are separated

they try and join back together

why is it hard to separate charges, what can be done to overcome this

they are attracted to one another, so you need to produce a force to deattach them

what is convention current in an electric circuit

it defins the direction of the eletric current as the direction of the positive charge

what is ment by the term complete circut

when there is a source of electrical energy, an unbroken pathway and at least one light bulb.

connecting wire

a straight line

light globe

a circle with a cross in it

battery

battery

switch

closed means the circut is on and open means the circut is off

voltmeter

circle with a v in it

anmeter

cirle with an a in it

resistor

rectangle

what do you have to do when drawing a circut

use a ruler and do it in pencil

what is voltege

voltage is the power of the electrons in the circut

how is voltage measured

through a voltmeter

where in a circut do charged particles usually have different amounts of energy

in a series circut the first bulb would have more volts then the second bulb

how is the energy added to the particles

though a battery pack

what does more pressure on a circut mean

the higher the voltage the more power it has on the circut, so the bulbs would be brighter

where does the voltmeter go in a circut

it goes parallel to the bulb

what is the units of current

amps, anmeter

what is the current meaning

current is the speed or rate at which electrons flow around a circuit

what is an electric circut

a path of electrical currents passing though many componats, and then looping back to the power source

what are 3 compounents of an electric circut

a power source like a battery, an unbroken pathway by having the switch closed and using wires to connect everything together, a converter of the electrical energy like a light bulb

what is an electric current created by where does it start and where does it move toward

an electrical current is created by a power source, like a bettery. it comes through the negative side and because opposites attract it moves towards the positive side and doing that is moves through the circut to light up the light bulb

what is ohms law

the eletric current flowing in a circuit is directly proportional to the voltage and inversely proportional to the resistance in that the circuit.

how to find voltage

current times resistance

how to find current

voltage divided by resistance

how to find resistance

voltage divided by current

how does electricity harm the body

it tences all the muscles in the body, you wouldn;t be able to let go

main safty devices that give protection from electriction

Residual current devices, rcd, fault circuit interrupters gfcl’s

what is a rcd

it monotrs the current in the house and it shuts of if the current is to fast