There is a parallel-plate capacitor with 2 circular conducting disks (radius of 20 cm and separated by 1.5 mm). 1. Find the capacitance in nF. 2. Find the charge on the capacitor plates if it is connected to a strong battery with a voltage of .75 kV. 3. Find the energy stored in the capactior with the .75 kV power supply connected. 4. Find the magnitude of the uniform electric field between the plates.  Please only the last two!

Physics for Scientists and Engineers, Technology Update (No access codes included)
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Author:Raymond A. Serway, John W. Jewett
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Chapter26: Capacitance And Dielectrics
Section: Chapter Questions
Problem 26.8P
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There is a parallel-plate capacitor with 2 circular conducting disks (radius of 20 cm and separated by 1.5 mm).

1. Find the capacitance in nF.

2. Find the charge on the capacitor plates if it is connected to a strong battery with a voltage of .75 kV.

3. Find the energy stored in the capactior with the .75 kV power supply connected.

4. Find the magnitude of the uniform electric field between the plates. 

Please only the last two!

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