Two isolated charged spheres each of magnitude + 1.0 x 10\(^{-6}\) C are seperated by a distance of 2.0 x 10\(^{-1}\) m. Calculate the magnitude of the electrostatic force between them [K = \(\frac{1}{4\pi \epsilon_o}\) = 9 x 10\(^9\)Nm\(^2\)C\(^{-2}\)]
-
2.25 x 10\(^{-1}\)N
- 4.50 x 10\(^{-1}\)N
- 2.25 x 10\(^1\)N
- 4.50 x 10\(^1\)N
The correct answer is: A
Explanation
F = \(\frac{Kq_1q_2}{r^2}\)
F = \(\frac{9 \times 10^9 \times (1.0 \times 10^{-6})^2}{(0.2)^2}\)
= 2.25 x 10\(^{-1}\)N