Suppose a disk with area A is placed in a uniform electric field of magnitude E.

Question

Suppose a disk with area A is placed in a uniform electric field of magnitude E. The disk is oriented so that the vector normal to its surface, n_unit, makes an angle theta with the electric field, as shown in the figure. (Figure 1) What is the electric flux Phi_E through the surface of the disk that is facing right (the normal vector to this surface is shown in the figure)? Assume that the presence of the disk does not interfere with the electric field. Express your answer in terms of E, A, and theta. http://session.masteringphysics.com/problemAsset/1003361/18/15500.jpg

Explanation / Answer

The electric flux ?E through the surface of the disk= ?E =EAcos?.

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