Practice Test 2

A fixed source charge $+Q$ is at the origin. Point A is at $r=0.50,\text{m}$ and point B is at $r=1.00,\text{m}$. Identical small test charges are placed at A and B. Compared to B, the electric field magnitude at A is

A fixed source charge $-Q$ is at the origin. Point P is at $x=0.30,\text{m}$ on the $+x$ axis. A small positive test charge is placed at P. Which statement best describes the electric field at P due to $-Q$?