A 0.106-A current is charging a capacitor that has square plates 6.00 cm on each side. The plate separation is 4.00 mm. (a) Find the time rate of change of electric flux between the plates.

Respuesta :

Answer:

The time rate of change of flux is [tex]1.34 \times 10^{10}[/tex] [tex]\frac{V}{s}[/tex]

Explanation:

Given :

Current [tex]I = 0.106[/tex] A

Area of plate [tex]A = 36 \times 10^{-4}[/tex] [tex]m^{2}[/tex]

Plate separation [tex]d = 4 \times 10^{-3}[/tex] m

(A)

First find the capacitance of capacitor,

   [tex]C = \frac{\epsilon _{o} A }{d}[/tex]

Where [tex]\epsilon _{o} = 8.85 \times 10^{-12}[/tex]

   [tex]C = \frac{8.85 \times 10^{-12 } \times 36 \times 10^{-4} }{4 \times 10^{-3} }[/tex]

   [tex]C = 7.9 \times 10^{-12}[/tex] F

But   [tex]C = \frac{Q}{V}[/tex]

Where [tex]Q = It[/tex]

  [tex]C = \frac{It}{V}[/tex]

  [tex]V = \frac{It}{C}[/tex]

Now differentiate above equation wrt. time,

  [tex]\frac{dV}{dt} = \frac{I}{C}[/tex]

       [tex]= \frac{0.106}{7.9 \times 10^{-12} }[/tex]

       [tex]= 1.34 \times 10^{10}[/tex] [tex]\frac{V}{s}[/tex]

Therefore, the time rate of change of flux is [tex]1.34 \times 10^{10}[/tex] [tex]\frac{V}{s}[/tex]

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