Parallel Plates

e- e- e- e- e- e- e- e- e- e- Connecting two parallel plates to a battery produces uniform electric field e- e- e- e- e- p+ p+ p+ p+ e- e- e- e- e- the electric field strength will depend on the distance between the plates and the voltage of the battery

This formula only applies to parallel plates! V = voltage of battery d = distance between the plates in m = magnitude of electric field strength in V/m This formula only applies to parallel plates!

electric field strength between the plates is uniform (a charge placed at any point in the field will experience the same force) the electric field outside of the plates is 0 the magnitude of the electric field depends on the magnitude of the charge on each plate field lines point from the + plate to the - plate

Examples Two parallel plates are 3.00 cm apart and have a potential difference of 7.10 x 103 V. If a charged object (q = 4.80 x 10-15 C) is placed in the field, what is the electric force acting on it?

2. A pair of oppositely charged parallel plates are separated by 5 2. A pair of oppositely charged parallel plates are separated by 5.33 mm and connected to a 600 V source of potential difference. What is the magnitude of the electric field between the plates? b) What is the magnitude of the force acting on an electron placed anywhere between the plates? c) How much work must be done on the electron to move it to the negative plate if it is originally placed 2.90 mm from the positive plate?

The electron volt is about The Electron Volt (eV) A unit of energy equal to the amount of kinetic energy an electron gains after being accelerated through an electric potential of 1 volt in a vacuum. The electron volt is about 1.60 × 10-19 J (on formula sheet)