Question Detail
Question
According to Solved Problem 25.2, how much work is required to carry an electron from the positive terminal of a 12-V battery to the negative terminal?
Correct Answer
Option A is the correct answer.
Detailed Explanation
From Solved Problem 25.2: The electron charge q = -1.6 × 10⁻¹⁹ C. Going from positive to negative terminal is a potential drop, so V = -12 V. The work done is W = qV = (-1.6 × 10⁻¹⁹ C)(-12 V) = 1.9 × 10⁻¹⁸ J.
Hint
Remember the charge of an electron and how work is calculated when moving a charge through a potential difference. Pay attention to the signs.