Sample test 1

# Sample test 1 - Physics 212 Sample Test I 1. Infinite lines...

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Physics 212 Sample Test I 1. Infinite lines of charge are placed on three corners of a square of side 0.2 m, as shown in the figure. If the linear charge density λ 2 = + 1 µ C/m, calculate the values of λ 1 and λ 3 so that the electric field at the fourth corner is zero. Answer: -0.35 μ C/m 2. The magnitude of the electric field at a distance r = 12 cm from the line of charge is 3 × 10 5 N/C; a. Find the magnitude of the field at a distance of 4 cm from this line of charge (a) E = 1 × 10 5 N/C (b) E = 9 × 10 5 N/C correct (c) E = 4.5 × 10 5 N/C (d) E = 0.75 × 10 5 N/C (e) E = 1.5 × 10 6 N/C b. At a distance 8 cm from the line charge, the electric field (a) points towards the line charge (b) is zero (c) points away from the line charge correct c. Find the net charge on a 1 meter length of this line of charge (a) Q = 2 µ C correct (b) Q net = 3.14 µ C (c) Q net = 6 µ C (d) Q net = 5 µ C (e) Q net = 10 µ C λ 1 λ 2 λ 3

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3. A point charge -50e lies at the center of a hollow spherical metal shell that has a net
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## This note was uploaded on 03/29/2011 for the course PHYS 101 taught by Professor Gatt during the Spring '11 term at UNO.

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Sample test 1 - Physics 212 Sample Test I 1. Infinite lines...

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