1. Based on the activity, how do you know whether an electromagnet han
increased its strength?
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1. Based on the activity, how do you know whether an electromagnet han
increased its strength?
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Answer:
Electromagnets work just as well as permanent magnets. In fact, they are even more useful, because you can turn them on and off. You'll find electromagnets in hard drives, speakers and even in sophisticated equipment like MRI machines and CERN's Large Hadron Collider in Geneva, Switzerland. You obviously need a stronger electromagnet for a particle collider than you do for a speaker, so how do scientists make magnets powerful enough to focus a beam of electrons? The answer is a bit more complicated than simply making them bigger, although that's part of it. The materials you use, the voltage you apply and the ambient temperature are all important.
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