A 5-Cm Radius Isolated Conducting Sphere Is Charged So Its

Multiple Choice

A 5-cm radius isolated conducting sphere is charged so its potential is +100 V, relative to the potential far away.The charge density on its surface is:

A) +2.2* 10^-7 C/m²
B) -2.2 *10^-7 C/m²
C) +3.5 * 10^-7 C/m²
D) -3.5 * 10^-7 C/m²
E) +1.8 * 10^-8 C/m²