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ENGPHYS 2A04 Final: Cheat Sheet

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Which of the following is true?
<ol>
<li>Amper's law is only true for systems with a lot of symmetry.</li>
<li>Ampere's law is only valid for current loops.</li>
<li>Ampere's law can be used to find the magnetic field inside a solenoid.</li>
<li>Ampere's law is valid only for a long straight wire.</li>
<li>none of these.</li>
</ol>

Compare Ampere's Law with the Biot Savart's Law. Which is more generally useful for calculating B for a current-carrying conductor?

The quantity <picture><source srcset="https://s3.amazonaws.com/prealliance-textbook-qa.oneclass.com/qa_images/homework_help/question/qa_images/202699086327096/question/0.webp?img=9f5cb021b4d09bbd5eb71c21172f9b5c" type="image/webp"><img src="https://s3.amazonaws.com/prealliance-textbook-qa.oneclass.com/qa_images/homework_help/question/qa_images/202699086327096/question/0.png?img=f0108ceba4664e92a6dee4e2926643c0" data-mlang="latex" data-equation="%5Cint%20B.ds"></picture>  in Ampere's law is called magnetic circulation. Figures 30.10 and 30.13 slum paths around which the magnetic circulation is evaluated. Each of these paths encloses an area. What is the magnetic flux through each area? Explain your answer. 
<picture><source srcset="https://s3.amazonaws.com/prealliance-textbook-qa.oneclass.com/qa_images/homework_help/question/qa_images/202699086327096/question/1.webp?img=970bfd7d171f5c8fddb2c7809ba33cd5" type="image/webp"><img src="https://s3.amazonaws.com/prealliance-textbook-qa.oneclass.com/qa_images/homework_help/question/qa_images/202699086327096/question/1.jpeg?img=7dbddf6725dc48415a05f4b494e5344a"></picture>

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ENGPHYS 2A04 Final: Cheat Sheet

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