Physhw 3-solutions

Physhw 3-solutions - billing (cab4763) hw 3 opyrchal...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: billing (cab4763) hw 3 opyrchal (121104) 1 This print-out should have 14 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 (part 1 of 3) 10.0 points An electric field of magnitude 2210 N / C is applied along the x axis. Calculate the electric flux through a rect- angular plane 0 . 241 m wide and 0 . 84 m long if the plane is parallel to the yz plane. Correct answer: 447 . 392 N m 2 / C. Explanation: Let : E = 2210 N / C , = 0 , L = 0 . 84 m , and W = 0 . 241 m . The area of the rectangle is A = L W = (0 . 84 m) (0 . 241 m) = 0 . 20244 m 2 . Since the field is uniform,the flux is = E A = E A cos = (2210 N / C) (0 . 20244 m 2 ) (cos0 ) = 447 . 392 N m 2 / C . 002 (part 2 of 3) 10.0 points Calculate the electric flux through the same rectangle, if it is parallel to the xy plane. Correct answer: 0 N m 2 / C. Explanation: The angle is = 90 ,cos = 0 , and = E A = E A cos = (2210 N / C) (0 . 20244 m 2 ) (0) = 0 N m 2 / C . 003 (part 3 of 3) 10.0 points Calculate the electric flux through the same rectangle, but now the rectangle contains the y axis and its normal makes an angle of 63 with the x axis. Correct answer: 203 . 112 N m 2 / C. Explanation: Let = 63 = E A = E A cos = (2210 N / C) (0 . 20244 m 2 ) (cos63 ) = 203 . 112 N m 2 / C . 004 10.0 points A closed surface with dimensions a = b = . 578 m and c = 0 . 5202 m is located as in the figure. The electric field throughout the region is nonuniform and given by vector E = ( + x 2 ) where x is in meters, = 3 N / C, and = 3 N / (C m 2 ). E y x z a c b a What is the magnitude of the net charge enclosed by the surface? Correct answer: 7 . 73788 10 12 C. Explanation: Let : a = b = 0 . 578 m , c = 0 . 5202 m , = 3 N / C , and = 3 N / (C m 2 ) . The electric field throughout the region is directed along the x-axis and the direction of billing (cab4763) hw 3 opyrchal (121104) 2 d vector A is perpendicular to its surface. Therefore, vector E is parallel to d vector A over the four faces of the surface which are perpendicular to the yz plane, and vector E is perpendicular to d vector A over the two faces which are parallel to the yz plane. That is, only the left and right sides of the right rectangular parallel piped which...
View Full Document

Page1 / 5

Physhw 3-solutions - billing (cab4763) hw 3 opyrchal...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online