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A hollow spherical conductor of radius R has charge Q. The potential difference between its surface and a point at infinity is:

Correct answer: A. kQ/R

  • A. kQ/R
  • B. kQ/R²
  • C. Zero
  • D. kQ/(2R)

Explanation

For a charged conductor, the potential at the surface is V = kQ/R, and at infinity, V = 0. Thus, the potential difference is kQ/R.

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Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.

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