4B_SP10_HW13 - 4B Homework 13 *Question 1 Two plates (as in...

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Unformatted text preview: 4B Homework 13 *Question 1 Two plates (as in figure 32-7) are being discharged by a constant current. Each plate has a radius of 7.60 cm. During the discharging, at a point between the plates at radial distance 3.80 cm from the central axis, the magnetic field has a magnitude of 13.5 nT. (a) What is the magnitude of the magnetic field at radial distance 11.4 cm? (b) What is the current in the wires attached to the plates? (a) Number 18.0 Units nT (b) Number 10.3 Units mA Answer a1: the number of significant digits is set to 3; the tolerance is +/-2% Answer b1: the number of significant digits is set to 3; the tolerance is +/-2% *Question 2 In the figure below an electric field is directed out of the page within a circular region of radius R = 2.50 cm. The magnitude of the electric field is given by E = (0.500 V/m•s) (1 - r/R)t , where radial distance r ≤ R and t is in seconds. What is the magnitude of the magnetic field that is induced at radial distances (a) 1.50 cm and (b) 7.50 cm? (a) Number 2.50E-20 Units T (b) Number 7.72E-21 Units T Answer a1: the number of significant digits is set to 3; the tolerance is +/-2% Answer b1: the number of significant digits is set to 3; the tolerance is +/-2% *Question 3 In Fig. 32-40, a parallel-plate capacitor is being discharged by a current In Fig....
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This note was uploaded on 11/17/2010 for the course PHYC 93456 taught by Professor Afdsadsf during the Spring '09 term at City College of San Francisco.

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4B_SP10_HW13 - 4B Homework 13 *Question 1 Two plates (as in...

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