Investigating Electromagnets
Aim: The aim of the experiment is to investigate what affects the strength of an electromagnet.
Hypothesis: The more coils and electricity the more powerful the electromagnet becomes.
Prediction: When the voltage of electricity is increased I think that the nail will have more magnetism allowing it to attract more paper clips, because with more voltage going through the circuit, it can then make the electromagnet stronger.
Variables:
Independent The independent variable which we can control is the amount of voltage we put through the electromagnet. In this case we have to change the amount of voltage to 2, 4, 6, 8, 10 and 12 volts.
Dependant The dependant variable is the amount of paper clips
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Conclusion: My results told me that as I raised the voltage the electromagnet gained strength and attracted minimal paper clips, until I raised the volts to 8, 10 and 12 and that was when the electromagnet really started to pick-up a lot more paperclips.
The trend showed that for every volt of electricity generated it attracted approximately one paper clip per volt. Therefore the trend showed that as the number of volts increased so too did the number of paper clips it attracted.
Discussion: It would have a major affect if there were more turns in the wire because the more times you coil the wire around the iron object the more electricity and power it gives the electromagnet. The effect of changing the core would have possibly made the electromagnet weaker because other metal aren’t as strong as iron. The effect of increasing the voltage would have made an electromagnet stronger because as mentioned above the more electricity and the more coils you add the stronger you make the magnet.
Evaluation: It was confusing trying to set the equipment up because we had to change a lot of things that were different to what our science book said because we didn’t have enough equipment to be able to do the proper experiment so we had to improvise.
There maybe some errors in my method with people understanding my explanation on how to do the experiment because the instructions may be interpreted differently. In my
16. Play with the voltage slider and describe what happens to the current in the coil and the magnetic field around the coil.
The content of this section depends to a large extend on the nature of the experiment. Topics here should include a section labelled:
If I were given the opportunity to repeat the experiment these are the parts of it that I would change:
This equipment is suitable for this experiment because it is easily available, it is easy to set up and use and it is easy to collect results with.
Write theories for each of your experiments performed here. They may not be the same as anyone else!
How did your proposed procedures or flow charts at the beginning of this experiment compare to the actual procedures of this lab exercise?
The experimental procedures for Lab 2 were provided on Blackboard labelled as “Pre-Lab 2: Techniques & Measurement”.
ELECTRICITY AND MAGNETISM Week 14: Homework 2 1. A spark can jump between two non – touching difference between them is sufficiently large. approximately 940 V is required to produce a spark How fast would a 1.3 m rod have to be moving in cause a spark to jump across the gap? [151 ms-1] conductors if the potential A potential difference of in an air gap of 1.0 × 10-4m. a magnetic field of 4.8 T to
This is the project that will blow your mind with knowledge. By the time you're done reading this CRA you're going to want to do this experiment.
This is a brief description of the hypothesis and the goals of the experiment. It should indicate what questions you, as a researcher, will be seeking to answer.
Describe what you did in the experiment, and include methods and materials used. Do not
Reflect on and explain possible sources of error in this experiment. Discuss at least two sources of
Conclusion: I will be using experiment B as it worked well when tested and it seems stronger than the other two experiments.
This experiment shall be repeated twice or more to enhance accuracy of the results obtained. Besides detecting systematic errors, this experiment would aid on the technique and understandings to the correct use of these equipments.
Originally electricity and magnetism were thought of as two separate forces. This view changed, however, with the publication of James Clerk Maxwell's 1873Treatise on Electricity and Magnetism in which the interactions of positive and negative charges were shown to be regulated by one force. There are four main effects resulting from these interactions, all of which have been clearly demonstrated by experiments: