Question

There is a charge Q=1 C located at and a charge -Q/2 located at m. What is the E-field (magnitude in units N/C and direction) at m ?

Answer 1

thnx nurali could u jst help me wid hw1

Answer 2

A point charge Q_1 = -2 \mbox{ } \mu \mbox{C} is located at x=0, and a point charge Q_2 = +8 \mbox{ } \mu \mbox{C} is placed at x = -0.5 \mbox{ m} on the x-axis of a cartesian coordinate system.The goal of this problem is to determine the electric field, \vec{E}(x) = E(x) \hat{x}, at various points along the x-axis.

(a)What is E(x) (in N/C) for x=-64.5 m ?

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What is E(x) (in N/C) at x=-0.26 m?

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What is E(x) (in N/C) at x=42 m?

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(b) At what point (apart from |x| = \infty), is E(x) = 0? Express your answer in meters.

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Answer 3

first one is wrong

Answer 4

ya now is correct thnx

Answer 5

Pleasure

Answer 6

A flat thin non-conducting ring has an inner radius and an outer radius . The disk is uniformly charged with charge per unit area .

(a) What is the electric field at the center, , of the ring? Express your answer in terms of the following variables, if necessary, , , and the constant (if needed, enter pi for , epsilon_0 for , sigma for , R_1 for .. etc).

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(b)What is the magnitude of the electric field at point which is a distance x above the point ? The line is perpendicular to the plane of the ring. Express your answer in terms of the following variables, if necessary, , , , and the constant (if needed, enter pi for , epsilon_0 for , sigma for , R_1 for .. etc).

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Answer 7

There are two conducting concentric hollow spheres of outer radii and ( ). The thickness of the material of both spheres is .

The inner sphere is negatively charged with charge density . The larger sphere is positively charged with charge density .

(a) What is the electric field (magnitude and direction) inside the inner sphere?


Direction: use units vectors in spherical coordinates ( , , )


Magnitude: (Express your answer in terms of the following variables, if necessary , , , , , and the constant . To enter type sigma_1, for type sigma_2, for type R_1, etc..)

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What is the electric field (magnitude and direction) at distance from the center of the spheres for the following values of :

(b) but larger than


Direction: use units vectors in spherical coordinates ( , , )


Magnitude: (Express your answer in terms of the following variables, if necessary , , , , , and the constant . To enter type sigma_1, for type sigma_2, for type R_1, etc..)

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(c) but smaller than


Direction: use units vectors in spherical coordinates ( , , )


Magnitude: (Express your answer in terms of the following variables, if necessary , , , , , and the constant . To enter type sigma_1, for type sigma_2, for type R_1, etc..)

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(d) but larger than


Direction: use units vectors in spherical coordinates ( , , )


Magnitude: (Express your answer in terms of the following variables, if necessary , , , , , and the constant . To enter type sigma_1, for type sigma_2, for type R_1, etc..)

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Answer 8

There is a very large horizontal conducting plate in the plane (consider it infinitely large). Its thickness is . The charge densities on the upper and the lower surfaces are both equal to .

The goal of this problem is to find the electric field (magnitude and direction) at different points.

(a) Consider a point above the upper surface. What is the direction of the electric field?

What is the magnitude of the electric field? Express your answer in terms of, if necessary, , and the constant .

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(b) Consider now a point below the lower surface. What is the direction of the electric field?

What is the magnitude of the electric field? Express your answer in terms of, if necessary, , and the constant .

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(c) Consider now a point below the top surface.

What is the magnitude of the electric field? Express your answer in terms of, if necessary, , and the constant .

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