A parallel-plate capacitor having plates 5.0cmapart is connected across the term

Question

A parallel-plate capacitor having plates 5.0cmapart is connected across the terminals of a 12Vbattery.

Part A

Being as quantitative as you can, describe the location of the equipotential surface that is at a potential of 6.8V relative to the potential of the negative plate. Avoid the edges of the plates.

Express your answer using two significant figures.

15000

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Part B

Do the same for the equipotential surface that is at 1.6V relative to the negative plate.

Express your answer using two significant figures.

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Part C

What is the potential gradient between the plates?

Express your answer using two significant figures.

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A parallel-plate capacitor having plates 5.0cmapart is connected across the terminals of a 12Vbattery.

Part A

Being as quantitative as you can, describe the location of the equipotential surface that is at a potential of 6.8V relative to the potential of the negative plate. Avoid the edges of the plates.

Express your answer using two significant figures.

d =

15000

  cm from the negative plate.

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Part B

Do the same for the equipotential surface that is at 1.6V relative to the negative plate.

Express your answer using two significant figures.

d =   cm from the negative plate.

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Part C

What is the potential gradient between the plates?

Express your answer using two significant figures.

E =   V/m  

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Explanation / Answer

a) it will changelinearly across the capacitor

V/Vtotal = x/d

6.8/12 = x/5

x = 5*6.8/12= 2.8 cm

b)
x = 5*1.6/12= 0.67 cm

c) E = V/d = 12/0.05= 240 V/m

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