What is the potential difference between the plates after the battery is disconn

Question

What is the potential difference between the plates after the battery is disconnected? Express your answer with the appropriate units. Constants A parallel-plate capacitor is charged by a 17.0 V battery, then the battery is removed. V= 17.0 V You may want to review (Pages 692 -695) Previous Answers Correct Here we learn how to determine the potential difference between the capacitor's plates after the battery is disconnected from it. Part B What is the potential difference between the plates after a sheet of Teflon is inserted between them? Express your answer with the appropriate units. Vy= 1 Value Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining

Explanation / Answer

b

Dielectric constant of teflon is

K=2

Initial charge is given by

Q=CV

Final Charge with teflon is

Q'=KCV'

When battery is disconneted ,charge remains constant

Q=Q'

CV=KCV'

=>V'=V/K =17/2

V'=8.5 Volts

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