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Physics Lab 4

# Physics Lab 4 - Name Jason Vazquez Partner Xing Lin TA...

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Name: Jason Vazquez Partner: Xing Lin TA: Faisal Yaqoob Experiment #4 Ohm’s Law Equations: (1) B = μI/2πr (2) F = ILB (3) F = (μ/2π)(L/r)(I^2) (4) r = d + [h (up) – h (down)] [l (pivot – wire) / 2L(mirror – meter stick)] (5) F = (μ/2π) (L/r) (I^2) = mg Theory: Determining the weight of the staples by measuring the mass of 210 staples, then dividing by the amount of staples, determine the mass of each staple. Using equation (5) determine the μ. Use the equation (4) to determine the r for equation (5). Procedure: 1. Adjust the wires so that they are separate by about half a centimeter. 2. Turn on the laser and adjust the meter stick so that the laser reflects and hits the meter stick. 3. Measure the distance between the centers of the two wires, determining the r of the equation. 4. Pushing the upper wire to touch the lower wire to measure the h (down). Once the system balances, you can note the h (up). 5. Use the caliper to measure the diameter d of one wire.

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