A 3500 pF (picofarads) air-gap capacitor isconnected to a 32 V battery. If a pie

Question

A 3500 pF (picofarads) air-gap capacitor isconnected to a 32 V battery. If a piece of mica fills the space between the plates, howmuch charge will flow from the battery? The K constant for mica is 7. I think it's just Q=CV, but it'snot right. Please need help this is due soon! A 3500 pF (picofarads) air-gap capacitor isconnected to a 32 V battery. If a piece of mica fills the space between the plates, howmuch charge will flow from the battery? The K constant for mica is 7. I think it's just Q=CV, but it'snot right. Please need help this is due soon!

Explanation / Answer

For a parallel plate capacitor   thecapacitance Co = o A /d                                                                              Given capacitance of parallel plate capacitor=3500 pF         If a piece ofmica fills the space between the plates                       capacitance C =    o A k/d                                               =   k Co                                                   =   3500 pF x 7.1                      Q = C V                          = 3500 pF x 7.1 x 32                          = 0.7 C

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