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PRACTICE · MEMBERSIntermediate · Single correct

PRACTICE / Electric potential

Potential near a positive charge

A +3 nC point charge is isolated in vacuum.

Find the electric potential 0.30 m from it.

Organize the givens & assumptions
  • q = 3×10⁻⁹ C
  • r = 0.30 m

Isolated point charge in vacuum; potential zero at infinity; k = 9 × 10⁹ N·m²/C².

  1. A−90 V-90\ \mathrm V
  2. B27 V27\ \mathrm V
  3. C90 V90\ \mathrm V
  4. D300 V300\ \mathrm V

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