일반물리학 2 · Gauss' Law · Problem 3
일반물리학 2 — Gauss' Law: Problem 3
3 An unknown charge sits on a conducting solid sphere of radius 10 cm. If the electric field 30 cm from the center of the sphere has the magnitude $3.0 \times 10^3$ N/C and is directed radially inward, (a) what is the net charge on the sphere? and (b) what is the charge density?
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