Two pointegrals (P) and (Q) are maintegralained at the poten... | Physics | SolveeIt

Question

Two points $P$ and $Q$ are maintained at the potentials of $10\,V$ and $-4\,V$ respectively. The work done in moving $100$ electrons from $P$ to $Q$ is

$-19 ?10^{-17}\, J$

$9.60 ?10^{-17}\, J$

$-2.24 ?10^{-16}\, J$

$2.24 ?10^{-16}\, J$

Answer

$2.24 ?10^{-16}\, J$

Explanation

Solution

$W = QdV = Q\left(V_{q} - V_{p}\right) = -100 ? \left(1.6 ? 10^{-19}\right) ? \left(- 4 - 10\right)$ $=+ 100 ? 1.6 ? 10^{-19} ? 14 = +2.24 10^{-16}\, J.$

Physics Question on electrostatic potential and capacitance

Solution