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tester [92]
3 years ago
9

(a) At a distance of 0.200 cm from the center of a charged conducting sphere with radius 0.100 cm, the electric field is 480 N&g

t;C. What is the electric field 0.600 cm from the center of the sphere
Physics
1 answer:
yan [13]3 years ago
6 0

Answer:

E = 53.3 N/C

Explanation:

The charge of the sphere can be found by Gauss’ Law:

\int\vec{E}d\vec{a} = \frac{Q_{encl}}{\epsilon_0}

We will draw an imaginary spherical surface around the original sphere with radius 0.2 cm. The integral in the left-hand side is the area of this surface, therefore no need to take the integral. The right-hand side is equal to the total charge enclosed by this imaginary surface.

E2\pi r^2 = \frac{Q_{enc}}{\epsilon_0}\\(480)4\pi(0.002)^2 = \frac{Q}{8.8\times 10^{-12}}\\Q = 2.12\times 10^{-13}

Now that we have found the charge of the sphere, we can now apply Gauss’ Law again to find the E-field 0.006 m from the center.

We will draw our second imaginary spherical surface with a radius 0.006 m.

E4\pi r^2 = \frac{Q}{\epsilon_0}\\E4\pi(0.006)^2 = \frac{2.12 \times 10^{-13}}{\epsilon_0}\\E = 53.3~{\rm N/C}

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