Physics
Physics, 21.09.2019 05:10, tiwaribianca475

Asolenoid is required to produce a magnetic field of 10 t in a cylindrical volume 5 cm in radius and 1 m long. the copper windings extend to 25 cm in radius and are 1 m long. consider two possible winding configurations: a) a strip of copper that is 1 m in width wound around a central tube so that it looks like a swiss roll dessert with one electrical connection along the central tube and the other connection along the outer winding. the current flows in a spiral. b) a "bitter plate" coil where the windings look like a stack of pancakes that have been split along a radius and connected to form a helix. the electrical connections are at the top and bottom of the pancake stack. assuming that the same current is used, calculate the power required to produce the required field for each of the winding configurations. neglect any space required for insulation. which configuration is more efficient and why? the resistivity of copper is approximately 3x 101 m. the magnetic field outside of the solenoids is negligible.

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