A point charges 2nC is located at orgin . What is the potential at (1, 0, 0)?
Correct answer: D. 18
- A. 12
- B. 14
- C. 16
- D. 18
Explanation
Electric Potential = kq / r Where: k= 9 x 109 Nm2C-2 q = 2nC = 2 x 10-9 C r = (1, 0, 0) = 1m Electric Potential = (9 x 109) x (2 x 10-9) / 1 Electric Potential = 18 V
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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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