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Introductory Physics Homework Help
Magnetism, Credit-Card magnetic strips
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[QUOTE="Nnk, post: 4943272, member: 532714"] [h2]Homework Statement [/h2] Experiments carried out on the television show Mythbusters determined that a magnetic field of 1000 gauss is needed to corrupt the information on a credit card's magnetic strip. (They also busted the myth that a credit card can be demagnetized by an electric eel or an eelskin wallet.) Suppose a long, straight wire carries a current of 2.5 A. How close can a credit card be held to this wire without damaging its magnetic strip? I'm not quite sure how to go about this problem, could anyone please explain it? [h2]Homework Equations[/h2] Magnetic field of a solenoid: [ATTACH=full]76521[/ATTACH] Where n=N/L[h2]The Attempt at a Solution[/h2] Answer: 5.0µm [/QUOTE]
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Magnetism, Credit-Card magnetic strips
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