2 physics problems on electricity and magnetism

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erqpne12

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2 problems on electricity and magnetism. I need detailed written solutions to these problems. Thanks

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h 3 1. A proton beam has a cross-section of 1 mm2 and a density of 4 billion protons/mm The protons all travel to the right at approximately the speed of light. (a) What is the electric current density of the proton beam? (b) How long will it take for this beam to deposit +1 C of charge on a fixed target? (c) Express the unit for resistance in terms of SI base units: m, s, kg, C. 8. A square loop of wire (side length L = 2 cm) is situated in the xy plane centered at the origin, in the presence of a uniform magnetic field of B = (+ŷ – ) T. A current of I = 1 A flows in the loop in a right-handed sense (counterclockwise) around the + direction. What is the magnitude and direction of the torque acting on the loop? (Use the right-hand-rule convention.) Z B - y — у X
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