9WI’s electrical

RESISTANCE

Resistance

Heaters become really hot because every heater has a resistor in it. Every heater has electrons in it that power the heater and warm the house up, but the only way heaters are able to get hotter and hotter is because the heater has a resistor that makes all the electrons that are moving around are forced to bunch up into a small space that makes them rub up against the wires inside the heater that have atoms on them and when an electron collides with an atom it makes a sort of flash that speeds up the electrons meaning more collision's and with the collision’s comes the hotness.

inside

Spira

l

wire

(resis

tor)

RESISTANCEON A HEATER

A heater has a process of turning energy into heat. Electric heaters work because of the electric current that is forced

through wires that contain a good deal of electrical resistance.What is resistance? Resistance makes electrons slow down

and moves some of their energy to heat energy. Some substances resist or prevent electrical current more then

others, EG: copper resists less electrical current then plastic.

Electrical resistance is where something slows down electrons, to stop them going

too fast, this is used to control them, because without resistance, electrons would travel to fast and overheat. An

example of resistance is coiled wire, the wire would be long and thin, forcing

electrons to go slower. Resistance is used in many things, like a kettle. In a kettle electricity goes from the plug into the cord, then into a coil of wire. In the coil there is lots of resistance, so when the

electricity goes into it, the coil will heat up. The coil is heated up because when

electrons get forced into a small gap then collide with atoms, making friction, which then causes heat. This is very useful in

kettles, oven, and over things. Although it may be dangerous because it is so hot.

The coil is in the bottom

Resistance in a kettle

The arrow symbolises the element. When the wire (right) heats up because the electron s are going really fast. The electrons push against the atom and are trying to squeeze through a small gap

Resistance

Resistance is what slows the electrons down from moving through the circuit. To increase the resistance, make the wires thinner and use materials that electrons don’t like to go through. In the toasters case, it uses a metal called nichrome which electrons can not easily pass through. The more resistance the hotter the appliance. The red wires burning is the resistance that the electrons go through. The red wires is the electrons moving through the circuit, but because of the resistance they are moving at a slower pace. The resistance can be controlled depending on what materials you use. The resistance is useful, because it makes the appliance hotter and it can control the electrons. The only dangers of resistance is there can be too much resistance.

TOASTERS

Resistance is a measure of how hard it is to push electricity through a circuit. Perhaps you see that the bigger the cross section of a wire the easier it is or the longer the wire. the harder it is. How good a conductor the material of which the wire is made has much to do with resistance as well. This factor is called resistivity (the Greek

letter rho is used).

Resistance

Electrons are negative

Electrical resistance is when something slows down the electrons. In this example there is a layer in the light bulb which slows down the electrons. The tungsten

filament in the light bulb increases resistance. Resistance can be controlled by the materials.Resistance

is important because it makes the flow of current.

LIGHT BULB

Hair DryerResistance is the reason for electrons slowing in speed and isused in our daily lives. This useful state is found in wires that are thin or have been constructed from a material which is a weak conductor. Once a fair amount of resistance has been allocated to a wire, electrons find it challenging to pass through so the speed at which they travel decreases.This is because the huge amount of electrons must each pass through theselected wire to reach their destination, causing their pace to becomeslower to prevent a scientific ‘traffic jam’.

Resistance is useful for this reason as electrons slowing in speed leads to electricity reaching the destination (In this case, a hair-dryer) at a later date. Therefore, the electricity and the time which it is used may be controlled. This is useful for not only hair-dryers but most electrical equipment. Like most great things, dangers are involved. Too much resistance may lead to no electricity reaching the equipment. I would also imagine that resistance may glitch in some way, causing the electrons to travel at a high speed when they are unable to pass through at such a pace. Overall, the risk is quite low if resistance is used in the correct manner. There is certainly no reason to not use resistance as it affects us in many positive ways, everyday.

Resistance in a TV

Resistance is when it is harder for electrons to travel and makes them slower. This is an important factor in a TV because too much electrons would travel very fast and rub against each other to create heat and energy to overheat the appliance and so the TV can explode. But you can control the amount of electrons through resistance for eg. You can make the wires thinner and longer so less electrons get through the wire and use more energy, so when they get to the appliance they will be weaker . Too much resistance can be bad as well because the TV won’t have enough electricity to power it. To insulate the electrcity you put rubber but in most places plastic is used so that the electricity doesn’t electrocute anyone. Also to further resistance ,metals that aren’t very good conductors ( but let electricity pass) are used instead of copper which is exellent in conducting. Usually resistance is used when there is an abundance of electricity that needs to be used at a certain pace and amount.

RESISTANCE:HAIR DRYER…

What is resistance? Resistance is what makes electrons slow down. The more faster they go, the less Resistance. The more slower they go the more Resistance.How do you think Resistance has increased?It has increased when the smaller the wire the less the electrons will power the appliance.What happens because of the resistance?If there is too much resistance then the electrons can’t get through for the alliance to work. Also a hair dyer contains a metal called nichrome it has a lot more resistance than any other wire made from copper.Can the Resistance be controlled?Yes, because of the sizes of the wires and what type of metal is contained inside the wires.Is the resistance useful?Yes, because it wouldn't overheat and burn the equipment.

ResistanceWhat is resistance?Resistance is what makes electrons slow down in an electric circuit.How do you think the resistance is increased?The resistance is increased by turning the electric equipment higher.What happens because of the resistance?The metal nichrome slows down the electrons causing it not to over heat. Nichrome is used in electric equipment because its not a good conductor. Can the resistance be controlled?Yes, because there is a control dial which also controls the heat. Is the resistance useful?Yes, because if we didn’t have it would over heat and burn the food.Are there any dangers from the resistance?No, because it will control the electrons.

Electrical Resistance is when something slows down electrons to stop them going fast they have these to slow down the electrons so that they wont go to fast and over heat Yes Resistance can be controlled and yes it is useful Some danger’s in resistance

Red Hot Resistance

By Scott Hughes

The arrow is pointing at the plug were all of the electrons is rushing threw and is heating up the element

Resistance

Resistance

is what

makes is

harder for

electrons

to move

through a

conductor.Electrons

give out

energy,

usually in

the form

of heat

and light.

Resistance is increased when

we turn the heat higher. Also,

the longer the heat is on, th

e

hotter it becomes.

Resistance can be controlled

when we turn the dial

higher or lower. It is

very useful because it

makes electrons slow

down, causing not

to over-heat.

Resistance What & how is the resistance

Increase?-Resistance=Voltage2/Power

=1202/1100 =13.1 (3sf

-Metal called nichrome -A hair dryer, the temperature of the air

stream from which is automatically controlled by the temperature of the hair being dried, is

provided-A hair dryer apparatus and method for use in

hair care.

HAIR DRYER

What is a resistance?Resistance is when electrons travel through coiled wire that’s made out of special metal and its hard for them to get through. The faster electrons go, the hotter the wire goes.

How do you think resistance is increased?By making the wire longer and skinnier

What happens because of the resistance?Its harder for the electrons to get through

Resistance

Are there any dangers from resistance?No, because resistance help heaters not to over heat

Resistance.

Electric Fry PanThe object that I have chosen is an Electric Fry Pan.

When the plug to the pan gets plugged into the wall, the pan automatically heats at a slow pace because the electrons get faster and faster while they flow through the plug and get to the base of the pan.

The pan wont automatically be as hot as you want it to because the electrons start to flow through the vertical pipe/chord, but as you turn up the heat on the pan the electrons start to speed up.

The resistance is useful because people may not finished using it the pan but if they turn the heat down, the electrons slow down because the pan doesn't need that much heat so some electrons can stop working or just slow down.

The danger with resistance for a fry pan is that when you have the heat on high the electrons go faster and faster and faster and the heat on the pan becomes so hot that if the electrons keep moving the handles may get hot as well.