Two spheres are made of conducting material. Sphere 2 has twice ...

[james0929]

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.

Question 2

Which of the following statements is incorrect?
 a. Capacitance is always positive.
  b. The symbol for potential difference between the plates of a capacitor is .
  c. Water is a polar molecule.
  d. When a dielectric is placed in a capacitor it serves to reduce the electric field.
  e. Nonpolar molecules cannot be used for dielectric material in a capacitor.

[coreycathey]

Answer to Question 1

b

Answer to Question 2

e

[james0929]

TYSM

[at]

Excellent