With vacuum between its plates, a parallel-plate capacitor has capacitance 4.50 mF. You attach a power supply to the capacitor, charging it to 2.80 kV, and then disconnect it. You then insert a dielectric sheet that fills the space between the plates. The potential difference between the plates decreases to 1.20 kV, and the charge on each plate remains constant. Find the energy stored in the capacitor (a) before you insert the sheet and (b) after you insert the sheet.
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.
With vacuum between its plates, a parallel-plate capacitor
has capacitance 4.50 mF. You attach a power supply to the capacitor,
charging it to 2.80 kV, and then disconnect it. You then insert a dielectric
sheet that fills the space between the plates. The potential difference
between the plates decreases to 1.20 kV, and the charge on each plate
remains constant. Find the energy stored in the capacitor (a) before you
insert the sheet and (b) after you insert the sheet.
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