1. What is the electric flux through a square surface (each side is 0.7 m) in a

Question

1. What is the electric flux through a square surface (each side is 0.7 m) in a constant electrie ield with magsitude 20 N/C, if the plane containing the surface is net at 22 degrees with respect to the electric Bield vector? 2. Consider a cireular surface oriented paralled to the g- a plane, whose center is at z-5 m and with a radius of 0.62 im (let n point in the +z direction). What is the fux through this surface due to an electrie field given by, E-31 +9rJ? oor sider a spherical ban of charge with radius Rand change density mi-ar where a ikacon tant. is the electrie field inside the balI What 3. (b) 0 4. A conducting spherical shell has an inner radius of 0.1 m and outer radius 0.14 m. There is a surfuce charge density of +8 x 10-5 C/m2 on the inner surface and a surface charge density of -7 x 10-5 C/m2 on the outer surface. What is the amount of charge (in C) contained in the cavity of the spherical shell, if any? Can i ler a solid·spherical insulator with a po itive and constant charge dean ity and centered at the origin. What is true concerning the magnitade of the electric felkd inside the sphere Let r be the distance from 5 the origin. (a) Insiklke the sphere, the electric field decreuses as r incroases (b) The electric field is zero inside the sphere (c) Inside the sphere, the electric field increasws as r increass. (d) The electric field is constant, but non-eero inside the sphere. 6 Gaus's law is given by To what does the q refer? (a) any charge inside the closed surface that is arranaged syinmetrically (b) the net charge inside the closed surface. (c) all the charge in the physical system. (d) the charge residing on insulators inside the closed surface. 7. Two parallel, flat, effectively infinite planes of charge are separated by a distance d. Plane 1 has a surface charge density, what mist the surface charge density be on Plane 2 for the electric field betwen the planes to have a magnitude of and pointing towards Plane 2? (a) (b) 1 112

Explanation / Answer

Question (6)
q refers to the net charge inside the closed surface.
Correct option - (b)

Question (9)

Due to symmetry, the electric field of a point charge must -
(e) Point radially from the charge.
Correct Option = (e)

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