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# Quiz 8 - Quiz 8 DL Rubric Codes Name(last(first Student ID...

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Quiz 8 DL # Name (last) (first) |___|___|___ Rubric Codes : Student ID: first 3 letters last name I certify by my signature that I will abide by the code of academic conduct of the University of California. Signature ANSWERS WITHOUT WORK WILL RECEIVE NO CREDIT. MARK YOUR ANSWERS CLEARLY. Problem 1: Consider a rectangular loop of current placed in an external uniform magnetic field, as shown below. The direction of current is shown. The same diagram is repeated twice, for ease of use with parts (a) and (b). (a) What is direction of the net force on the loop? What is the direction of the net torque? What, if anything, happens to the loop while the current is flowing the loop? Hint: Consider the force on each of the four sides of the loop. Draw all relevant forces and torques on the diagram above. (b) Consider the same loop of current to be a magnetic dipole. What happens to it? Hint: Label N and S on the diagram and determine the direction of the dipole moment? Does the dipole interact with the magnetic field? (c) Do your answers to parts (a) and (b) agree or disagree?

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