Chapter 18, Problem 40P

& BIO Electric field of a fish An African fish called the aba has a charge $q\text{=+1}\text{.0**\#x00A0;}\times {\text{10}}^{\text{-7}}\text{C}$ at its head and an equal magnitude negative charge -q at its tail (see Figure P18.40 ). Determine the magnitude and direction of the electric field at position A and the force exerted on a hydroxide ion $\left(\text{charge -}e\right)$ at that point. The fish and ion are in water. Indicate any assumptions that you made.