Questions regarding magnetism indiction

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science kid
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hey I am looking for a little help with some physics questions. if you can help me please either respond with the answers or e mail me at ... <email-deleted>.

1. a curcular current loop made of flexible wire is located in a magnetic field B; you may keep B constant or vary it. Describe three ways an emf can be introdiced in the loop
 
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Please show your work and you'll get plenty of help.