A capacitor is made with seven metal plates connected and separated by sheets of mica having a thickness of 0.2 mm and a relative permittivity of 6. The area of one side of each plate is measuring 25cm by 20cm. If the insulation of the capacitor is perfect, the charge on the plates remains constant. This means that the electric flux density and therefore the potential gradient in the dielectric must remain unaltered. a) Calculate the force, in newtons, on each disc when the p.d. between them is 1.0 kV. b) Calculate the capacitance in microfarads.c) Calculate the p.d. across the combination and the electrostatic energies before and after the capacitors are connected in parallel of 70 μF capacitor is charged from a 200V supply. After being disconnected it is immediately connected in parallel with a 50 μF capacitorin series with 20 μF which is initially uncharged.
A capacitor is made with seven metal plates connected and separated by sheets of mica having a thickness of 0.2 mm and a relative permittivity of 6. The area of one side of each plate is measuring 25cm by 20cm. If the insulation of the capacitor is perfect, the charge on the plates remains constant. This means that the electric flux density and therefore the potential gradient in the dielectric must remain unaltered. a) Calculate the force, in newtons, on each disc when the p.d. between them is 1.0 kV. b) Calculate the capacitance in microfarads.c) Calculate the p.d. across the combination and the electrostatic energies before and after the capacitors are connected in parallel of 70 μF capacitor is charged from a 200V supply. After being disconnected it is immediately connected in parallel with a 50 μF capacitorin series with 20 μF which is initially uncharged.
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A capacitor is made with seven metal plates connected and separated by sheets of mica having a thickness of 0.2 mm and a relative permittivity of 6. The area of one side of each plate is measuring 25cm by 20cm. If the insulation of the capacitor is perfect, the charge on the plates remains constant. This means that the electric flux density and therefore the potential gradient in the dielectric must remain unaltered.
a) Calculate the force, in newtons, on each disc when the p.d. between them is 1.0 kV.
b) Calculate the capacitance in microfarads.
c) Calculate the p.d. across the combination and the electrostatic energies before and after the capacitors are connected in parallel of 70 μF capacitor is charged from a 200V supply. After being disconnected it is immediately connected in parallel with a 50 μF capacitorin series with 20 μF which is initially uncharged.
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