Two Spheres Are Made of Conducting Material

question 16

Multiple Choice

Two spheres are made of conducting material. Sphere #2 has twice the radius of Sphere #1. What is the ratio of the capacitance of Sphere #2 to the capacitance of Sphere #1?

• A)1, since all conducting spheres have the same capacitance.
• B)2
• C)4
• D)8
• E)A single sphere has no capacitance since a second concentric spherical shell is necessary to make a spherical capacitor.Thus, none of the answers above is correct.

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