• 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
  7. 7
    7
  8. 8
    8
  9. 9
    9
  10. 10
    10
  11. 11
    11

Investigate the relationship between electromagnet strength and amount of current flowing through the wire.

Extracts from this document...

Introduction

image00.png

image01.png

image02.png

image03.png

Investigate the relationship between electromagnet strength and amount of current flowing through the wire.

1. PLAN:

Diagram:

image10.pngimage04.png

image06.pngimage05.png

image07.png

image08.png

image09.png

The Experiment:

I set up the equipment as shown in the diagram above. I put the variable resistor in the circuit to vary the current flow. I put the ammeter in the circuit to measure current flow at certain points. I then added an electromagnet to show that when electricity flows through a wire wrapped around a magnetically soft iron core, a magnetic field is created. I also added the electromagnet because we needed it to investigate the relationship between electromagnet strength and the amount of current flowing through the wire. Moreover, I added a battery consisting of 3 cells to provide electrical energy to the circuit. Furthermore, I added a load to the electromagnet to provide a measurement of magnetic strength of the electromagnet. Finally, I needed the clamp stand to hold the electromagnet and to balance the load. I also kept all the equipment the same throughout the whole experiment to maximise efficiency.

   In this experiment there were 2 variables; the independent variable (the current) and the dependant variable (the mass to pick up). However, to keep this test as fair as possible, I tried to minimise the effect of the variables on the experiment. Firstly, I  tried to measure the readings from the ammeter as accurately as possible (to the nearest 0.01 or 0.02 amps). Then, I tried to measure the load as accurately as possible.

...read more.

Middle

   However, if I do not reach the part of the graph where the points level off (if there is not enough current to line most of the domains up), then I will only plot the first part of the S-shape, corresponding to an x2 graph (a parabola of a quadratic equation).

   As a summary, I believe that as the current increases, more mass will be picked

...read more.

Conclusion

   The third factor, which may have affected my results, was the error in my measurements of mass. The masses I used (excluding the mass of the hook, attached to the electromagnet to hold the masses) were either 100g masses or 50g masses. This meant that the error in measurement was 50g. This made the test unfair, creating possible anomalous results. However, I tried to keep the graph as fair as possible by creating error bars on the graph to account for this factor.

   Finally, I could make a few improvements to this experiment, to make it even fairer. Firstly, I could perhaps record my current every 0.1A rather than 0.2A as this helps to make the experiment fairer with a smaller error range.

   I could also repeat the experiment 5 or 6 times to iron out any outliers and keep the results as compact as possible, with an almost perfect correlation for the graph.

   Lastly, instead of using masses of 50g, I could use masses of 10g. This would help to reduce the size of the error bars shown on my graph.

...read more.

This student written piece of work is one of many that can be found in our AS and A Level Electrical & Thermal Physics 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

See related essaysSee related essays

Related AS and A Level Electrical & Thermal Physics essays

  1. Find out what factors affect the strength of an electromagnet.

    Same with the variable resistor and the wires used. To ensure this, I will obtain all my results in the same day. Results: Current Strength 1 Strength 2 Strength 3 Average Strength 0.5 0.4 0.5 0.4 0.4 1.0 1.2 1.2 1.1 1.2 1.5 2.1 2.0 2.2 2.1 2.0 2.4 2.5

  2. Free essay

    Resistance of a wire

    3.0 1.17 1.14 1.12 1.14 2.63 300 3.0 0.99 0.84 0.97 0.93 3.22 350 3.0 0.80 0.88 0.81 0.83 3.46 400 3.0 0.74 0.66 0.68 0.69 4.34 450 3.0 0.48 0.54 0.48 0.50 6 R = V / I Rearranges to V / I = R R being the resistance, what we are trying to find out.

  1. resistivity if a nichrome wire

    Voltage 1 (Volts) Voltage 2 (Volts) Voltage 3 (Volts) Average voltage (Volts) Current (Amps) Resistance (ohms) R=V/I 0.100m 0.200m 0.300m 0.400m 0.500m 0.600m 0.700m 0.800m 0.900m 1.000m I will then plot a scatter graph of the relationship between length and resistance. The length will be on the x-axis and the resistance will be displayed on the y-axis.

  2. The strength of an electromagnet.

    Magnets can be formed from certain metals (listed above). These metals have a crystal or domain structure. Magnets are made up of hundreds of thousands of domains. A domain is about1/1000th mm long and would consist of about 10 thousand million atoms. A domain is similar to a little crystal of iron.

  1. Investigating how temperature affects the resistance in a wire

    To get as close to the true values as possible, I am using a linear treadline. I am also going to use the treadline as a basis for my conclusions on the relationship as it is the closest to the true value and therefore will be the most accurate, and will give me the most accurate value of k.

  2. Investigating the factors affecting the size of current flowing through a length of resistivity ...

    = current(I) x resistance(R) or rather V=IR. Using Ohm's law we can see that doubling the resistance halves the current as R=V/I. Since in my experiments the voltage will always be constant at 3.0V, R???1?? I. Putting this into the formula for resistivity above, you can see that ? ?

  1. An investigation to investigate if current through an electromagnet effects the magnetic force?

    Planning Experimental procedures The quantity that I am intending to investigate in my experiment is the strength of the electromagnet The factors that affect the strength of an electromagnet are: The temperature, current, length of the core, diameter, the thickness of the wire used for the coils, how tightly the

  2. Energy Efficiency Experiments

    We recorded the voltage, mass of crane, length of string, and time it took to travel from the bottom to the top of it. Experiment 4- Crane (repeated 3 times) Experiment 4 Result 1 Result 2 Result 3 Current(A) 0.17 0.16 0.17 Voltage(V)

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