A point charges 2nC is located at orgin . What is the potential at (1, 0, 0)?
Correct answer: D. 18 V
- A. 12 V
- B. 14 V
- C. 16 V
- D. 18 V
Explanation
The electric potential V due to a point charge is calculated using the formula V = kq / r. Given:k (Coulomb's constant) = 9 x 109 Nm2C-2q (charge) = 2nC = 2 x 10-9 Cr (distance) = 1 m (distance from the origin to the point (1, 0, 0))Substituting these values into the formula results in V = (9 x 109) x (2 x 10-9) / 1 = 18 V.Options A, B, and C are incorrect because they involve errors in calculation or substitution of values into the formula.
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