Question

What is the surface charge density \[\sigma\] on a plate carrying charge \[Q\] over area \[A\]?

Options

• \[\sigma=\frac{Q}{A}\]

• \[\sigma=\frac{A}{Q}\]

• \[\sigma=QA\]

• \[\sigma=\frac{Q}{2A}\]

Answer 1

Surface charge density is the charge distributed per unit plate area. For charge \[Q\] on area \[A\], it is \[\sigma=\frac{Q}{A}\].