### Purpose:

To look into how different factors affect the strength of the electromagnet.

### Introduction:

There are wholly two factors that I am traveling to look into in this experiment:

m F1: How the figure of spirals affects the strength of the electromagnet.

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m F2: How a alteration in current affects the strength of an electromagnet.

### Hypothesis:

m F1: I think as the figure of coils addition the strength of the electromagnet would besides increase.

m F2: I think as the current increases the strength of the electromagnet would besides increase.

### m F1:

* Mugwump: Number of spirals.

* Dependent: Distance at which compass acerate leaf deflects. ( +/-0.05 centimeter )

& A ; middot ; Constants: Current, diameter of the wire, temperature, same Fe nucleus.

### m F2:

* Independent: Current ( +/-0.01amps )

& A ; middot ; Dependent: Distance at which compass acerate leaf deflects. ( +/-0.05 centimeter )

& A ; middot ; Constants: Number of spirals, diameter of the wire, temperature, same Fe nucleus.

### Apparatus:

* Power Supply

* Ammeter ( & A ; plusmn ; 0.01amps )

* Electromagnets with different figure of spirals

* Plastic Ruler ( & A ; plusmn ; 0.05cm )

* Ploting Compass

* Crocodile cartridge holder wires

* Rheostat

### Procedure:

& A ; middot ; Using crocodile cartridge holders connect the circuit in the undermentioned manner:

### & A ; middot ; F1:

& A ; religious order ; Take an Fe nail and with the aid of a nichrome wire, spiral it around the nail 5 times.

& A ; religious order ; Switch over the circuit on and wait for a minute.

& A ; religious order ; Note down the changeless current.

& A ; religious order ; Take the plotting compass and steadily put it near to the electromagnet and skid it off in a consecutive line till the needle deflects somewhat to one side from its vertically consecutive place.

& A ; religious order ; Place a swayer from the north pole of the electromagnet and note the distance where this warp occurs. This where the magnetic field lines would about stop, and therefore more the distance more the field lines and greater the strength.

& A ; religious order ; Repeat the stairss above but with 10, 15, 20, 25, 30 and 35 spirals.

& A ; religious order ; For the same figure of spirals measure the distance of warp 2 times for a 2nd test.

### & A ; middot ; F2:

& A ; religious order ; Using the same circuit now adjust the variable resistance so that U have a current of 0.5amps fluxing through the circuit.

& A ; religious order ; Make the changeless figure of spirals to be 10 spirals.

& A ; religious order ; Take the plotting compass and steadily put it near to the electromagnet and skid it off in a consecutive line till the needle deflects somewhat to one side from its vertically consecutive place.

& A ; religious order ; Place a swayer from the north pole of the electromagnet and note the distance where this warp occurs. This where the magnetic field lines would about stop, and therefore more the distance more the field lines and greater the strength.

& A ; religious order ; Repeat the stairss above but with 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0 and 5.5 As.

& A ; religious order ; For the same current record the distance two times for a 2nd test.

### Raw Data Table

F1: Consequence of the figure of spirals on the strength of the electromagnet.

Number of Coils of electromagnet

### Distance of warp from North Pole of the magnet ( +/-0.01cm )

Trial 1

Trial 2

5

1.7

1.9

10

4.9

5.1

15

7.6

7.5

20

9.5

9.5

25

12.3

12.1

30

14.8

15

35

16.9

17.2

Changeless Current

0.75 A

### F2: How altering current affects the distance at which the acerate leaf deflects.

Current ( +/-0.01A )

### Distance from North Pole of the magnet ( +/-0.05cm )

Trial 1

Trial 2

0.5

1.3

1.2

1.0

2.9

3.0

1.5

4.6

4.6

2.0

6.2

6.3

2.5

7.9

8.0

3.0

9.3

9.5

3.5

10.7

10.8

4.0

11.6

11.8

4.5

12.1

12.3

5.0

12.6

12.9

5.5

12.8

12.8

Changeless No. of Coils

10

### Processed Data Table:

The lone processing that can be done in this experiment is to happen the mean distance for the probes for both the tests and therefore doing it easier to do the graph.

### F1: Consequence of the figure of spirals on the strength of the electromagnet.

Number of Coils of electromagnet

Average Distance of warp from North Pole of the magnet ( +/-0.05cm )

5

1.8

10

5

15

7.55

20

9.5

25

12.2

30

14.9

35

17.05

Changeless Current

0.75 A

F2: How altering current affects the distance at which the acerate leaf deflects.

Current ( +/-0.01A )

### Average Distance from North Pole of the magnet

( +/-0.05cm )

0.5

1.25

1.0

2.95

1.5

4.60

2.0

6.25

2.5

7.95

3.0

9.40

3.5

10.75

4.0

11.70

4.5

12.20

5.0

12.75

5.5

12.80

Changeless figure of spirals

10

Now I will plot the graphs of both these norms.

### Graph Analysis: ( Graph at the End )

F1: As you can see the graph is proportionate. As the figure of spirals increases the strength of the electromagnet besides increases. There is a positive co-relation and this can be proved by theory every bit good. As the figure of coils addition, the magnetic field of each spiral besides increases and therefore a larger magnetic field would do the electromagnet to be stronger. There is merely one anomalousness in our consequences at 20 spirals and this can be neglected as it is a really minor anomalousness.

F2: In this graph besides we notice that there is a positive co-relationship and hence the current is proportionate to the strength of the magnet. As current in a circuit increases the strength of the magnet would besides increase as the spiral is provided with more charge and therefore the field lines would be spread over a larger country and the strength would be larger. But in this graph after 4.0 amps the graph is no longer proportionate. This can be due to the big sum of heat generated in the wires doing more opposition and the value of current would hold changed and therefore the curve in the graph.

### Decision:

Our hypothesis for both the factors was proven right by our graphs. Strength of an electromagnet is proportionate to the current and the figure of spirals in the solenoid. As the figure of coils addition the country of the magnetic field lines besides increases hence a stronger electromagnet is produced. It is the same for an addition in current. But after a certain current it becomes tough to keep other changeless factors like temperature which might do inaccurate consequences.

### Evaluation:

& A ; middot ; We could hold taken more tests to acquire better consequences.

& A ; middot ; We could hold used an insulated wire so that the wire wo n’t heat up so fast and it would n’t hold changed our consequences.

& A ; middot ; The current was n’t ever demand. It kept fluctuating hence it may hold given inaccurate readings.

& A ; middot ; The exact distance where the acerate leaf turned would be really tough to happen out as it turns over a scope of distance hence that may hold given inaccurate consequences.

### Fair Trial:

* The distance between the spirals was kept the same in all the tests.

* For the first experiment we kept the current invariable so that we can reasonably compare the consequences.

* For the 2nd experiment we kept the figure of spirals the same so that we can reasonably compare the consequences.

* And for both the experiments we kept the same stuff of the nucleus and the wire.

### Safe Trial:

& A ; middot ; As it was covering with electricity we made certain we did non touch any unfastened terminals to forestall ourselves from acquiring a daze.

& A ; middot ; Besides we did non touch the wire right after the experiment was over as it may hold been rather hot.

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