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Licemer1 [7]
3 years ago
6

Air "breaks down" when the electric field strength reaches 3 x 10^6 N/C, causing a spark. A parallel-plate capacitor is made fro

m two 5.1 cm x 5.1 cm plates. How many electrons must be transferred from one plate to the other to create a spark between the plates?
Physics
2 answers:
Maksim231197 [3]3 years ago
8 0

Answer:

number of electron transferred is 4.31\times 10^{11} electron

Explanation:

Given data:

Area of the parallel plate capacitor is

A = 0.051 × 0.051 m

Electric field for parallel capacitor is

E = \frac{\sigma}{\epsilon}

E =  \frac{Q}{A \epsilon}

Q = EA\epsilon

  = 3\times 10^{6} \times 0.0026 (8.854\times 10^{-12}})    [tex]= 6.90 \times 10^{-8}

   =69 \times 10^{-9}

C = 69 nC

  Q = ne

n = \frac{69 \times 10^{-9}}{1.6\times 10^{-19}}

n = 4.31\times 10^{11}

therefore number of electron transferred is 4.31\times 10^{11} electron

Flura [38]3 years ago
6 0

Answer:

n=4.31\times 10^{11}              

Explanation:

It is given that,

Electric field due to the spark, E=3\times 10^6\ N/C

Dimensions of the parallel-plate capacitor is 5.1 cm × 5.1 cm.

The area of the parallel plate, A=26.01\ cm^2=0.002601\ m^2

The electric field due to the parallel plate capacitor is given by :

E=\dfrac{q}{A\epsilon_o}

q=EA\epsilon_o

q=3\times 10^6\times 0.002601\times 8.85\times 10^{-12}

q=6.90\times 10^{-8}\ C

Let n is the number of electrons that must transferred from one plate to the other to create a spark between the plates. It can be calculated as :

q=ne

n=\dfrac{q}{e}

n=\dfrac{6.90\times 10^{-8}}{1.6\times 10^{-19}}

n=4.31\times 10^{11}

So, the number of electrons must be transferred from one plate to the other is 4.31\times 10^{11}. Hence, this is the required solution.

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