Practice question

**Electric field** defined as E = F/q₀, force per unit positive test charge, unit N/C or V/m, direction along force on positive test charge. For point charge, E = k q/r² radially outward for q>0. Field lines start on positive and end on negative, density indicates strength. Torque ( tau = pE sin θ ) arises from the couple formed by forces on the dipole’s charges. The perpendicular component of the field to the dipole axis determines the rotational effect, which is maximum at 90° and zero when aligned (sin 0° = 0). Substituting values gives Perpendicular component, which matches expected magnitude for this electrostatic