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# Then where in units of the diameter the is 10 in a

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Unformatted text preview: nits of the diameter, the ) is 10 in A, 2.5 in B, 40 in C, and 1.25 in D. (c) [3pt] In the circuit shown, with the switch open the capacitor is completely uncharged. The switch is closed for a long time. The current supplied by the battery is 0.2 A. Determine the value of the unknown resistor . 60 120 F 90 24.0 V A. B. C. D. E. If the switch has been closed a long time, the capacitor is fully charged, so no current flows through it. The total resistance is and the unknown resistor is in series with a 90 resistor, so 7 (d) [3pt] An electron is accelerated from rest through a voltage of 560 V. The electron enters a uniform magnetic field of magnitude 52 mT and follows a circular path. Determine the radius of the circular path. The electron’s mass is kg and its charge is C A. 1.0 mm B. 1.3 mm The centripetal force is C. 1.5 mm D. 1.8 mm with E. 2.0 mm due to energy conservation. Therefore, (e) [3pt] A current is uniformly distributed through a straight solid wire of radius 5.0 mm. The magnetic field just outside the wire has a magnitude of mT. What is the magnetic field at a point a distance of 2.5 mm from the center of the wire? (Assume inside the wire.) A. 10.0 mT B. 20.0 mT C. 28.3 mT D. 40.0 mT E. 80.0 mT By Ampere’s Law, Therefore, the magnetic field increases linearly with the radius from the center to the edge of the wire. Half-way to the outer edge, the magnetic field will be half as great as at the surface....
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## This document was uploaded on 03/09/2014 for the course PHYS 222 at Ohio Northern University.

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