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genaroaG6119
26.02.2020 •
Physics
What total charge qq must be distributed uniformly over a spherical shell of radius R=0.30mR=0.30m to produce an electric field with magnitude 700 N/CN/C at a point just outside the surface of the shell?
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Ответ:
7 x 10⁻⁹C
Explanation:Inside the spherical shell, the electric field is zero, but outside the surface of the shell, the electric field (E) is given by;
E =
----------------------(i)
Where;
k = proportionality constant = 9 x 10⁹Nm²/C²
Q = total charge over the spherical shell
r = the radius of the shell
From the question;
E = 700N/C
r = 0.30m
Substitute these values into equation (i) to get the total charge, Q, as follows;
700 =![\frac{9 * 10^9* Q}{0.3^2}](/tpl/images/0525/1179/d3ff0.png)
700 =![\frac{9 * 10^9* Q}{0.09}](/tpl/images/0525/1179/57a8a.png)
700 x 0.09 = 9 x 10⁹ x Q
63 = 9 x 10⁹ x Q
Solve for Q;
Q = 63 / (9 x 10⁹)
Q = 7 x 10⁻⁹C
Therefore, the total charge is 7 x 10⁻⁹C
Ответ:
carter is now at swimming pool(11)
Explanation: