es are 0.20 mm dia
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Transcribed Image Text:Consider the following circuit. Assume all wires are 0.20 mm diameter copper wires and that the
battery is ideal:
12 µF
6 µF
12 V
6 µF
12 µF
What is the equivalent capacitance for the circuit?
а.
b.
What is the charge on each capacitor and the voltage across each capacitor?
с.
How much energy is stored when all the capacitors are fully charged? If there is a
total of 20 cm of wire used in the circuit, what is the total resistance in the circuit.
d.
Suppose that once the capacitors are fully charged, they are disconnected from the
battery, and the wires are then connected to each other forming a complete circuit. What is the
maximum current that will flow in the wire? Does this current increase with time, decrease with
time or remain steady? Explain.
Suppose a piece of Pyrex glass is inserted between all the capacitors (see table 26.1).
Explain (in words) how an insulating material affects the capacitance, the voltage, the charge and
the energy storage capability of a capacitor. Repeat the calculations from parts a, b and c.
е.
Transcribed Image Text:Dielectric
Dielectric
strength
Material
constant k Emax (10° V/m)
Vacuum
1
Air (1 atm)
1.0006
3
Teflon
2.1
60
Polystyrene
plastic
Mylar
Раper
Ругex glass
2.6
24
3.1
7
3.7
16
4.7
14
Pure water
(20°C)
80
Titanium
dioxide
110
6.
Strontium
300
8
titanate
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