Question

In: Physics

A parallel-plate capacitor is made from two aluminum foil sheets, each 5.4 cm long and 4.9...

A parallel-plate capacitor is made from two aluminum foil sheets, each 5.4 cm long and 4.9 cm wide. The two sheets are separated by a distance of 0.024 mm.

1)

What is the capacitance of this capacitor?

C = μF

2)

If a potential difference of 2 volts is applied across the two plates of this capacitor, what is the absolute value of the charge on the plate with the higher voltage?

q_higher = μC

3)

What is the absolute value of the charge on the plate with the lower voltage?

q_lower = μC

4)

Now a piece of teflon with a dielectric constant of κ = 2.1 is inserted to fill the space between the plate.

What is the capacitance of the capacitor with the teflon inserted?

C = μF

5)

If a potential difference of 2 volts is applied as before across the two plates of this capacitor, what is the absolute value of the charge on the plate with the higher voltage with the teflon inserted?

q_higher = μC

6)

Based on your above calculations, did the capacitance of the capacitor increase or decrease when the teflon was inserted?

(1) increase
(2) stayed the same
(3) decrease

7)

Based on your above calculations, did the amount of charge on the plate with the higher voltage increase or decrease when the teflon was inserted?

(1) increase
(2) stayed the same
(3) decrease

Expert Solution

genius_generous answered 1 year ago

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