A constant potential difference of 12 V is maintained betweenthe terminals of a 0.25 mF, parallel-plate, air capacitor. (a) Asheet of Mylar is inserted between the plates of the capacitor, completelyfilling the space between the plates. When this is done, howmuch additional charge flows onto the positive plate of the capacitor? (b) What is the total induced charge on either faceof the Mylar sheet? (c) What effect does the Mylar sheet have on theelectric field between the plates? Explain how you can reconcile thiswith the increase in charge on the plates, which acts to increase theelectric field.

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.