Electric potential and field patternsEdexcel A-Level Physics: Mind map

Exam questions on Electric potential and field patterns

1. Two large parallel metal plates are 0.040 m apart in a vacuum. A potential difference of 600 V is maintained across them. Away from the edges of the plates the field between them can be treated as uniform.
   Calculate the electric field strength between the plates and the magnitude of the force on an electron in the field.2 marks
2. A small sphere carries a charge of +8.0 nC. It may be treated as a point charge in a vacuum. Point P is 0.30 m from the centre of the sphere.
   Calculate the electric potential at P.2 marks
3. A tiny oil droplet of mass 2.6 × 10⁻¹⁵ kg carries a negative charge. It is held at rest between two horizontal parallel plates, 15 mm apart, by a potential difference of 480 V across the plates.
   Calculate the electric field strength between the plates and state which plate is at the higher potential.3 marks