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Physics, 17.03.2020 02:03 ysabel0420
A resistor with resistance R and an air-gap capacitor of capacitance C are connected in series to a battery (whose strength is "emf").
(a) What is the final charge on the positive plate of the capacitor? (Use the following as necessary: C, emf.)
Q =
(b) After fully charging the capacitor (so there is no current), a sheet of plastic whose dielectric constant is K is inserted into the capacitor and fills the gap. Explain why a current starts running in the circuit. You can base your explanation either on electric field or on electric potential, whichever you prefer.
This answer has not been graded yet.
(c) What is the initial current through the resistor just after inserting the sheet of plastic? (Use the following as necessary: R, K, emf. Note that the K is an upper-casek.)
I =
(d) What is the final charge on the positive plate of the capacitor after inserting the plastic? (Use the following as necessary: C, K, emf. Note that the K is an upper-case k.)
Qnew =
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