The membrane of a living cell can be approximated by a parallel-plate capacitor withplates of area 4.75 * 10-9m2, a plate separation of 8.5 * 10-9m,and a dielectric with a dielectric constant of 4.5. (a) What is theenergy stored in such a cell membrane if the potential differenceacross it is 0.0725 V? (b) Would your answer to part (a) increase,decrease, or stay the same if the thickness of the cell membrane isincreased? Explain
Dielectric Constant Of Water
Water constitutes about 70% of earth. Some important distinguishing properties of water are high molar concentration, small dissociation constant and high dielectric constant.
Electrostatic Potential and Capacitance
An electrostatic force is a force caused by stationary electric charges /fields. The electrostatic force is caused by the transfer of electrons in conducting materials. Coulomb’s law determines the amount of force between two stationary, charged particles. The electric force is the force which acts between two stationary charges. It is also called Coulomb force.
The membrane of a living cell can be approximated by a parallel-plate capacitor with
plates of area 4.75 * 10-9
m2
, a plate separation of 8.5 * 10-9
m,
and a dielectric with a dielectric constant of 4.5. (a) What is the
energy stored in such a cell membrane if the potential difference
across it is 0.0725 V? (b) Would your answer to part (a) increase,
decrease, or stay the same if the thickness of the cell membrane is
increased? Explain
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
