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Physics with MasteringPhysics | 4th Edition | ISBN: 9780321541635 | Authors: James S. Walker
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Credit-Card Magnetic Strips Experiments carried out on the

Chapter 22, Problem 73GP

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QUESTION:

Problem 73GP

Credit-Card Magnetic Strips 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 eel skin wallet.) Suppose a long, straight wire carries a current of 3.5 A. How close can a credit card be held to this wire without damaging its magnetic strip?

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QUESTION:

Problem 73GP

Credit-Card Magnetic Strips 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 eel skin wallet.) Suppose a long, straight wire carries a current of 3.5 A. How close can a credit card be held to this wire without damaging its magnetic strip?

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Here, we have to find how close the credit card can be held to the wire carrying a current of 3.5 A.

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