S94(3) - Physics 4B FINAL EXAM Chapters 23 - 34 Spring 1994...

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1 Physics 4B FINAL EXAM Chapters 23 - 34 Spring 1994 Name:_________________________________________ Solve the following problems in the space provided. Use the back of the page if needed. Each problem is worth 10 points. You must show your work in a logical fashion starting with the correctly applied physical principles which are on the last page. Your score will be maximized if your work is easy to follow because partial credit will be awarded. 1. A 5.00μC charge is 25.0cm from a second charge. The electric field created by these charges is zero at a point in between the two that is 15.0cm from the 5.00μC charge. Find the size of the second charge. 2. State Gauss's Law in words (Don't just "write the equation" with words and don't use the word "flux" unless you explain what it means.). Explain why it works. Discuss the conditions that must be met to use it to find the electric field due to a charge distribution.
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2 3. Find the potential due to a ring of total charge Q and radius R at the point P
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S94(3) - Physics 4B FINAL EXAM Chapters 23 - 34 Spring 1994...

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