A-level Physics (Advancing Physics)/Electric Potential/Worked Solutions

ε0 = 8.85 x 10−12 Fm−1 1. Draw a diagram of a uniform electric field between two plates, showing the field lines and the equipotentials. Image:Field_lines_equipotentials_parallel_plates.svg 2. Do the same for the electric field around a point charge. Image:Electric_field_point_lines_equipotentials.svg 3. The potential difference between two plates is 100V. What is the potential difference between a point halfway between the plates and one of the plates? Half of 100 is 50V. 4. What is the electric potential at a point 0.2m from an alpha particle (charge on an electron = -1.6 x 10−19C)? The charge on an alpha particle is 3.2 x 10−19C. 5. What is the electric potential energy of an electron at the negative electrode of an electron gun if the potential difference between the electrodes is 10V?