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Unformatted text preview: benavides (jjb2356) – homework 29 – Turner – (59130) 1 This print-out should have 10 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points What current is required in the windings of a long solenoid that has 1990 turns uni- formly distributed over a length of 0 . 79 m in order to produce a magnetic field of magnitude 0 . 000337 T at the center of the solenoid? The permeability of free space is 4 π × 10 − 7 T · m / A . Answer in units of mA. 002 10.0 points A single piece of wire is bent into the shape of Texas, with a total area of 12 . 4 cm 2 . This Texas shaped loop is perpendicular to a mag- netic field which increases uniformly in mag- nitude from 0 . 352 T to 2 . 36 T in a time of 2 s. The wire has a total resistance of 3 Ω. What is the current? Answer in units of mA. 003 10.0 points A toroid having a rectangular cross section ( a = 2 . 51 cm by b = 1 . 53 cm) and inner radius 2 . 29 cm consists of N = 720 turns of...
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