Two concentric imaginary spherical surfaces of radius R and 2R respectively surround a positive point charge Q located at the center of the surfaces. When compared to the electric flux φ1 through the surface of radius R, the electric flux φ2 through the surface of radius 2R is. a. φ2 = 1/4φ1b. φ2 = 1/2φ1c. φ2 = φ1d. φ2 = 2φ1e. φ2 = 4φ1

c.

Explanation:

the electric flux is given by the Gaussian's theorem:

where Q is the net charge inside the surface and e0 is the dielectric permittivity of vacuum. Due to in both cases the electric flux is independt of the radius of the surface and only depends of the charge Q. We conclude that both fluxes are equal.

c

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