1. Jan 12, 2010

### almedmat

1. The problem statement, all variables and given/known data
The homemade capacitor is assembled by placing two 6 in pie pans 8 cm apart and connecting them to the opposite terminals of a 9 V battery.

(a) Estimate the capacitance.
___ pF
(b) Estimate the charge on each plate.
____ pC
(c) Estimate the electric field halfway between the plates.
___ V/m
(d) Estimate the work done by the battery to charge the plates.
____ J

2. Relevant equations

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3. The attempt at a solution
I have no idea where to start

2. Jan 12, 2010

### ideasrule

What's the capacitance of a parallel-plate capacitor?

3. Jan 12, 2010

### almedmat

4. Jan 12, 2010

### ideasrule

Yes, so you should be able to calculate the capacitance of the homemade capacitor, which is essentially two parallel plates.

5. Jan 12, 2010

### almedmat

Can you point of which formula(s) i should use? Thanks

6. Jan 12, 2010

### ideasrule

7. Jan 12, 2010

### almedmat

What does A or D refer to? and What is the Epslion number?

8. Jan 12, 2010