BONUS: Capacitor A metal bar is inserted into a parallel plate capacitor as shown above. The separation of the plates is a and the width of the metal bar is b. The area of the plates is A. Compute the energy stored in the capacitor when the metal bar is absent and when it is present. (Assume the capacitor plates have charge Q in both cases.) (a) Do you have to do work to insert or to remove the bar? Justify your response. (b) Determine the capacitance of the system when the metal bar is between the plates.
BONUS: Capacitor A metal bar is inserted into a parallel plate capacitor as shown above. The separation of the plates is a and the width of the metal bar is b. The area of the plates is A. Compute the energy stored in the capacitor when the metal bar is absent and when it is present. (Assume the capacitor plates have charge Q in both cases.) (a) Do you have to do work to insert or to remove the bar? Justify your response. (b) Determine the capacitance of the system when the metal bar is between the plates.
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Transcribed Image Text:BONUS: Capacitor
b
A metal bar is inserted into a parallel plate capacitor as shown above. The separation of the plates is a and the width of
the metal bar is b. The area of the plates is A. Compute the energy stored in the capacitor when the metal bar is absent
and when it is present. (Assume the capacitor plates have charge Q in both cases.)
(a) Do you have to do work to insert or to remove the bar? Justify your response.
(b) Determine the capacitance of the system when the metal bar is between the plates.
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