The Strength Of An Electromagnet Essay, Research Paper

The strength of an Electromagnet

Planing Experimental processs

“ h The measure that I am meaning to look into in my experiment

is the

strength of the electromagnet

“ h The factors that affect the strength of an electromagnet are: The

temperature, current, length of the nucleus, diameter, the thickness of the

wire used for the spirals, how tightly the spirals of wire are wrapped around,

the stuff and besides the figure of bends on the electromagnet.

“ H I am merely traveling to change current in the experiment, all the other

factors

I will maintain invariable

“ H I have chosen to change current because, the more bends there are, the

more

powerful the magnet becomes and therefore the more spheres there are. The

thicker the diameter is, the more spheres there are in the center and

hence the stronger the electromagnet becomes.

The higher the temperature is, the easier it is for the spheres to be able

to turn and line up. If you use a dilutant wire it will do more opposition

in the experiment. All of these factors will alter the strength of the

electromagnet.

“ H I decided to make current, as the others were more hard to make

“ H I believe that when I do the experiment, proportionately as the

current

additions, the strength will increase.

Force ( N )

Current ( A )

“ H I have made this anticipation because as you increase the current, you

will

bring on more spheres to line up- and if its proportional, you would so

double your current which would hence duplicate the spheres ( force ) . If you

were to cut a magnet in half, it doesn & # 161 ; & # 166 ; T destroy it, in existent fact two

magnets are created.

If you wanted, you could go on cutting the magnets in half each clip

hence doing the magnets smaller and smaller. In theory, if we used an

highly crisp, but still little blade, we would be able to on cutting

magnets in half until we reached a limit-this would be called a sphere and

is about 1/1000th millimeters long and would dwell of approximately 10 thousand million

atoms.

An unmagnetised Fe would look like this:

Using the current in the spirals, you would be able to re-align some of

the

spheres. If you did this and as a consequence more of the spheres were indicating

in the same way, so the Fe would hold become a weak magnet.

A weak magnet would look like this:

When you switch off the current, the spheres would return back to a random

set up. Obviously, if you were to line more spheres up, the magnet would

bcome much stronger, until you were to make a province where you had aligned

all the possible domains up.

A to the full magnetised magnet would look like this:

“ H Apparatus used: An electromagnet, powerpack, variable resistance,

ammeter,

an Fe saloon and an electric balance. The undermentioned diagram is how we set the

experiment up:

“ H To mensurate the strength of the electromagnet, foremost of all we had to

weigh the Fe saloon. We so switched the current on to flux through the

circuit. By taking a scope of different readings off both the balance and

the ammeter, we established that as you increased the sum of current, the

Fe saloon got lighter. This is because the electromagnet was acquiring

stronger, drawing the Fe saloon up and taking the force per unit area off from the

electric balance.

“ H First of all I will put up the setup as planned, and I will take

readings runing from 6A to 0.5A. Then look intoing the fluctuation in the weight

of the Fe saloon. I did some preliminary experiments so that I could happen out

the scope of the current, and how much electromotive force

was needed in the experiment,

and besides precisely how far the electromagnet should be off from the Fe saloon.

“ H I did a preliminary experiment before the existent experiment

“ H I tested what was a safe current. I found out that a current up to

six

As was satisfactory. We besides tested what was a safe distance for an

electromagnet from the Fe bar-ten centimetres was excessively far, two centimetres

was excessively close, five centimetres was a satisfactory distance.

Analyzing Evidence & A ; Drawing decisions

To pull a decision from my graph, foremost of all I would split it into

three

subdivisions: Section A ( the underside ) , subdivision B ( the center ) and subdivision C ( the

top ) . This

would now do it easier to depict.

The first subdivision ( A ) looks like it does because for the sum of current

put in, merely

a few of the spheres had lined up.

My 2nd reading that I took was inaccurate, so on my graph I have circled

it, and discluded it in the drawing of the curve. The graph so gets

steeper ( subdivision

B ) , this is because all of the spheres are now run alonging up. As the strength of

the

current goes up, the strength of the electromagnet goes up straight

proportionate to it. In subdivision C, all of the spheres had lined up. Section

C was non

drawn in on my graph because of the fact that there was non plenty of a broad

scope

of readings available to be taken with the setup that I was given.

The graph was non what we had expected, as I wrote in my planning that I

was anticipating to be pulling a consecutive line graph. This anticipation was incorrect

because we had non expected the spheres to take clip to line up. We thought

that

they would line up directly off.

Measuring Evidence

In the experiment, the current changed quicker as it increased per

centimetre we pushed the variable resistance. This made it fluctuate more, and

it was hence harder to be able to obtain accurate readings. After we had

been transporting out the experiment for a piece, the saloon may hold retained a

spot of magnetic attraction if a big adequate current was put through. There was besides a

alteration in the temperature of the bar-it heated up.

When making the experiment we made certain that we turned it off after taking

each reading so as we kept control of the temperature in the experiment and

to avoid it heating up and impacting the experiment, doing it unjust. There

was less opportunity of acquiring an anomale in the experiment because we took an

norm of the three consequences. It was a moderately accurate experiment, and

if I repeated it I would acquire similar consequences. I can warrant all but the

3rd subdivision on my graph ( C ) because I didn & # 161 ; & # 166 ; Ts go to a high adequate electromotive force,

but if I did I would hold obtained the & # 161 ; & # 167 ; leveling off zone & # 161 ; & # 168 ; because other

people utilizing a high adequate electromotive force did.

If I wanted to do some betterments to the experiment, I would take the

consequences five times, and to a greater grade of truth of current and

weight loss ( four decimal topographic points or more ) . We besides could hold tried to maintain

the temperature more changeless by non go forthing the current on between the

returns of readings and go forthing it to chill. We should besides hold zeroed the

balance before taking each reading.

To widen the probe I could hold tried changing the figure of spirals,

or another factor, maintaining the current invariable, so another variable and

comparing the consequences of changing those others. I could besides hold tried utilizing

Fe filings for an illustration to see if different consequences were given.

Biblography

Books that I have used for aid are: A new and natural philosophies by D.Brybant and

D.E.Kershaw besides Advanced natural philosophies Fieldss, moving ridges and atoms by T.Duncan.