A Crude Magnetometer. You and your team have been tasked with estimating the magnetic field between the poles of a giant electromagnet. All you have to use to make this estimate is a power source that provides dc current, a piece of stiff copper wire that is 6.5 cm long, light wires to make connections, and a plastic spring that has an unstrained length of 3.5 cm and a spring constant of k = 110 N/m. The poles of the magnet are arranged so that the uniform field between them is horizontal. You attach one end of the spring to a support so that it hangs vertically between the poles of the magnet. You then attach the stiff copper wire to the lower end of the spring so that the wire is horizontal and perpendicular to the field. Finally, you connect the light, flexible wires to each end of the stiff wire and let them hang vertically. You run a current of 2.5 A through the wire. (a) With the magnet turned off, the spring stretches 0.25 cm vertically downward from its equilibrium position. What is the combined weight of the wires? (b) You turn on the magnet and measure the total (stretched) length of the spring to be 5.2 cm. What is the magnitude of the magnetic field?

A Crude Magnetometer. You and your team have been tasked with estimating the magnetic field between the poles of a giant electromagnet. All you have to use to make this estimate is a power source that provides dc current, a piece of stiff copper wire that is 6.5 cm long, light wires to make connections, and a plastic spring that has an unstrained length of 3.5 cm and a spring constant of k = 110 N/m. The poles of the magnet are arranged so that the uniform field between them is horizontal. You attach one end of the spring to a support so that it hangs vertically between the poles of the magnet. You then attach the stiff copper wire to the lower end of the spring so that the wire is horizontal and perpendicular to the field. Finally, you connect the light, flexible wires to each end of the stiff wire and let them hang vertically. You run a current of 2.5 A through the wire. (a) With the magnet turned off, the spring stretches 0.25 cm vertically downward from its equilibrium position. What is the combined weight of the wires? (b) You turn on the magnet and measure the total (stretched) length of the spring to be 5.2 cm. What is the magnitude of the magnetic field?

Physics for Scientists and Engineers

10th Edition

ISBN:9781337553278

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter29: Sources Of The Magnetic Field

Section: Chapter Questions

Problem 8P: One long wire carries current 30.0 A to the left along the x axis. A second long wire carries...

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