• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3
4. 4
4
5. 5
5
6. 6
6

# Investigation into the factors affecting the strength of electromagnets - Planning Experimental Procedures.

Extracts from this document...

Introduction

INVESTIGATION INTO THE FACTORS AFFECTING THE STRENGTH OF ELECTROMAGNETS

Planning Experimental Procedures

There are three main factors which affect the strength of an electromagnet:

1. The size of the current.
2. The number of turns the coil has.
3. What the core is made of.

For this investigation, I intend to explore how the number of coils of insulated wire around an iron core effects the amount of paper clips attracted to the electromagnet.

My prediction using results from the pilot study is that if I increase the number of coils the strength of the electromagnet will also increase (more paper clips will be attracted to the EM). However I have read that in theory, the strength of the EM will double as the number of coils are doubled (EM strength is directly proportional to the number of turns of coil).

I will use the following apparatus for this experiment: paper clips, soft iron core, insulated wire, voltmeter, ruler, wire stripper, crocodile clips and power pack. I have chosen this equipment because it suits the experiment I am doing and should also give me accurate results. The power pack will allow me to work with a safe voltage and to convert mains AC to DC.

First I will connect the voltmeter to the power pack. From the voltmeter I will attach two connecting wires to the crocodile clips.

Middle

10

7

6

4

20

13

22

16

30

30

30

33

40

34

40

36

50

53

65

54

60

60

76

75

70

80

89

85

80

89

102

97

90

99

104

102

100

100

105

111

A further table was drawn in order to show the average results.

 No.

Conclusion

If I were to repeat this investigation I would use slightly different apparatus in order to gain even more accurate results. I would use a wooden stand and clamp the electromagnet at a fixed distance from the tray of paperclips. This would improve the accuracy of the results and perhaps I would have more confidence in my prediction. I would also use different types of wire that can conduct electricity, e.g. nichrome or aluminium. Then I could compare those results with the results gained in this experiment. If possible I would try and investigate readings beyond 100 coils or I would increase the number of coils in steps of 5.

Also, a different shape of iron core could be used, e.g. u-shaped. “In this case the strength of the electromagnet is more powerful than a straight one for obvious reason that both poles can be used to attract and lift iron objects; but it is actually much more than twice as powerful as a single pole.” If the experiment was done using a u-shaped electromagnet it would give comparable and much more accurate results.

In order to get extra information on the topic I would investigate the other two factors which affect the strength of an electromagnet. I would use varying amounts of currents or I could use a different core for the electromagnet.

This student written piece of work is one of many that can be found in our AS and A Level Fields & Forces section.

## Found what you're looking for?

• Start learning 29% faster today
• 150,000+ documents available
• Just £6.99 a month

Not the one? Search for your essay title...
• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

# Related AS and A Level Fields & Forces essays

1. ## paper cones investigation

5 star(s)

This should provide between 10 and 20 results. Diagrams Instructions 1. A mark is made on a white board at a height of 2m (?10mm). The measurement is made using a plumb line pre-measured at 2m using a metre rule.

2. ## Investigate four factors that may affect the strength for electromagnets: the number of turns, ...

4 star(s)

record 5 successive readings on the graphical calculator as 'X1 T' (since the reading changes all the time), on the ammeter as I1 6 Turn off the switch and change only and decrease the resistance of the rheostat and thus a bigger current.

1. ## How does the number of coils on an electromagnet affect its strength?

When a current is passed through the metal the molecules all face the same direction creating an electromagnet. After the current is stopped the molecules stay in those positions for a while longer, but if you hit it with a hammer they scatter, demagnetising the piece of metal.

2. ## To investigate the effect of current on the strength of an electromagnet field.

This will be easy to keep constant. 4. Number Of Coils To keep this constant, I will use the same number of turns coiled around the bar at each reading. To make sure the coils do not unwind, I will use insulation tape at each end of the bar, a

1. ## Investigating a factor affecting the voltage output of a transformer.

in mind whilst carrying out my practical; * The power supply mustn't be on whilst I change the nominal voltage. * The power supply mustn't be switched on until the circuits are fully connected. * I will limit the size of the nominal voltage.

2. ## Young Modulus of Copper

When a wire is stretched by a force , the length of course will increase , but at the same time the cross sectional area of the wire will also vary . This little variation will affect the calculation of Young modulus by a pretty substantial degree .

1. ## How can I work out the Young's Modulus of copper wire?

This shows me that strengthening the loop does not improve the accuracy of the measurement. My prediction was wrong - in actual fact, a different yield point should not change the elastic properties of the material, and therefore would not change the gradient.

2. ## Einstein's theory of relativity.

If we examine the spectral lines of an element on our earth with the spectral lines given off by the same element on the sun or on a star, the spectral lines of the element on the sun or star should be very slightly shifted toward the red end of

• Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to