Electric fields and Coulomb's lawEdexcel A-Level Physics: Mind map

Exam questions on Electric fields and Coulomb's law

1. A small sphere carries a charge of +2.0 nC. When it is placed at a point P in an electric field it experiences a force of 6.0 × 10⁻⁵ N.
   Calculate the electric field strength at P.2 marks
2. Two small charged spheres, X and Y, carry charges of +3.0 nC and +5.0 nC. They are in a vacuum with their centres 0.060 m apart. The spheres may be treated as point charges.
   Calculate the magnitude of the force between X and Y.2 marks
3. A point charge of +6.0 nC is fixed in a vacuum. A student investigates the electric field around it at a point Q that is 0.15 m from the charge.
   Calculate the electric field strength at Q and state its direction.3 marks