일반물리학 2 — Electric Potential: Problem 65

65 An infinite nonconducting sheet has a surface charge density \(\sigma = +5.80 \text{ pC/m}^2\). (a) How much work is done by the electric field due to the sheet if a particle of charge \(q = +1.60 \times 10^{-19} \text{ C}\) is moved from the sheet to a point \(P\) at distance \(d = 6.15 \text{ cm}\) from the sheet? (b) If the electric potential \(V\) is defined to be \(5.00 \text{ mV}\) on the sheet, what is \(V\) at \(P\)?