Question

Prelab: Capacitors

1) Watch the video on ultra capacitors (DON’T TRY THIS AT HOME!). Explain why one can get higher current out of a capacitor then batteries with the same voltage across the terminals – use equations to show this.

2) How is the equivalent capacitance of a series and a parallel circuit calculated?

3) What is the purpose of a dielectric? How does it affect the capacitance?

4) How can you find the energy stored in a capacitor?

5)

What is the capacitance of a Ruby mica capacitor with an area of 1 by 2 cm with a distance between the plates of 2 mm? Write your answer in pico farads. For example, if you got 3.18 x 10^-10 F, that would be 318 pF.

Answer 1

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