A parallel-plate capacitor is made from two aluminum foilsheets, each 5.4 cm long and 4.9 cm wide. The two sheets areseparated 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 twoplates of this capacitor, what is the absolute value of the chargeon the plate with the higher voltage?

q_higher =   μC  

3)

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

q_lower =   μC  

4)

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

What is the capacitance of the capacitor with the tefloninserted?

C =    μF  

5)

If a potential difference of 2 volts is applied as before acrossthe two plates of this capacitor, what is the absolute value of thecharge on the plate with the higher voltage with the tefloninserted?

q_higher =    μC  

6)

Based on your above calculations, did the capacitance of thecapacitor 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 onthe plate with the higher voltage increase or decrease when theteflon was inserted?

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