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# Lab #6 - assuming the y direction is parallel with...

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Marc Pomi 106040098 3/26/2009 Physics 134 Lab Recitation 01 (Mon 12:50-2:50) Lab #6 Magnetic Forces 2 Abstract: The purpose of this experiment is to test the force on a wire carrying current in a magnetic field produced by a solenoid. Procedure: 1. Adjust the balance so that the small coil is approximately in the middle of the Helmholtz coils then with the weight attached zero the scale out. 2. Calibrate the balance by hanging a 1 gram mass off the end of the small coil and adjust the balance so that the scale reading is about 7-8 grams. 3. Adjust the small power supply until the current is 500 mA and re-zero the scale. 4. Hang several lengths of fire on the small coil and obtain the weight readings then adjust the current so the scale reads zero and record current value. 5. Repeat step 4 for four times for different amounts of wire. Questions: 1. The gravitation torque is perpendicular to the earth’s gravitational force in the “xz plane”

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Unformatted text preview: assuming the y direction is parallel with earth’s gravitational field. 2. The gravitational torque is 0.0018 Nm. The scale reading is 7.25 grams. 3. The magnetic force produced by the small coil. 4. 5. The magnetic force produces a torque as show by countering the gravitational force that produce torque. Results: I(amps) Weight(g) τg τm 0.9 0.06 0.0000153 0.0035 1.62 0.14 0.0000357 0.0063 2.93 0.24 0.0000612 0.0113 3.94 0.31 0.00007905 0.0153 5.52 0.47 0.0001985 0.0214 Conclusion: Using several weights and different amperages, we were able to determine a magnetic force can create a substantial torque to counter earth’s gravitational field and torque. Some sources of error may include vibration of the table and improper calibration of the scale due to touching the magnetic arm with the small coil....
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