Question 1: A spherical shell contains three charged objects. The first and seco

Question

Question 1:

A spherical shell contains three charged objects. The first and second objects have a charge of -17.0 nC and 37.0 nC respectively. The total electric flux through the shell is -953 N·m2 / C. What is the charge on the third object?

Question 2:

There is an electric flux of 25.5 N·m2 / C through the square region shown in the figure to the right. Each side of the square has a length of 0.100 m, and the electric field is at an angle of = 61.0° relative to the plane of the surface. Assuming that the field is uniform over the region shown, what is the magnitude of the electric field?

Explanation / Answer

1) As, electric flux = Qnet/eo

=>   -953 = (- 17 + 37.0 + Q) * 10-9/(8.85 * 10-12)

=> Q = - 28.43 * 10-9 C

          =   - 28.43 nC

Thus, the charge on the third object =   - 28.43 nC

2) As, E * A * cos(theta) = 25.5

=> E * 0.100 * 0.100 * cos29 = 25.5

=> E = 2915.55 N/C

Thus, magnitude of the electric field = 2915.55 N/C

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