Homework 8

# Homework 8 - homework 08 KANUNGO ANIL Latest unpenalized...

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homework 08 – KANUNGO, ANIL 1 Latest unpenalized work: Sep 20 2007 Thurs- day 04:00 (after this date you can not make a perfect score). Work cutoff: Sep 20 2007, 4:00 am. Question 1, chap 25, sect 2. part 1 of 3 10 points Consider a long, uniformly charged, cylin- drical insulator of radius R and charge density 1 . 4 μ C / m 3 . (The volume of a cylinder with radius r and length is V = π r 2 .) R 2 . 6 cm What is the electric field inside the insulator at a distance 2 . 6 cm from the axis (2 . 6 cm < R )? Answer in units of N / C. Question 2, chap 25, sect 2. part 2 of 3 10 points Determine the absolute value of the po- tential difference between r 1 and R , where r 1 < R . (For r < R the electric field takes the form E = C r , where C is positive.) 1. | V | = C parenleftbigg 1 r 2 1 - 1 R 2 parenrightbigg 2. | V | = C ( R 2 - r 2 1 ) 3. | V | = 1 2 C ( R 2 - r 2 1 ) 4. | V | = C r 1 5. | V | = C r 1 2 6. | V | = C ( R - r 1 ) 7. | V | = C parenleftbigg 1 r 1 - 1 R parenrightbigg 8. | V | = C ( R - r 1 ) r 1 9. | V | = 1 2 C ( R - r 1 ) r 1 10. | V | = C radicalBig R 2 - r 2 1 Question 3, chap 25, sect 2. part 3 of 3 10 points What is the relationship between the po- tentials V r 1 and V R ? 1. V r 1 < V R 2. None of these 3. V r 1 > V R 4. V r 1 = V R Question 4, chap 25, sect 3. part 1 of 4 10 points A charge - 1 . 1 × 10 - 5 C is fixed on the x - axis at 7 m, and a charge 1 . 1 × 10 - 5 C is fixed on the y -axis at 5 m, as shown.

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