The current that charges a capacitor transfers energy that is stored in the capacitor’s electric field. Consider a 2.0 μF capacitor, initially uncharged, that is storing energy at a constant 200 W rate. What is the capacitor voltage 2.0 μs after charging begins?

Respuesta :

Answer:

the capacitor voltage is V = 20 V

Explanation:

Given,

Capacitance of the capacitor =  2.0 μF

energy stored = 200 W

time (t) =2.0 μs

Capacitor voltage = ?

[tex]\dfrac{dE}{dt}=200 W[/tex]

[tex]E =200\times 2 \times 10^{-6}[/tex]

[tex]E =400 \times 10^{-6}\ J[/tex]

we know,

[tex]E = \dfrac{1}{2}CV^2[/tex]

[tex]V =\sqrt{\dfrac{2E}{C}}[/tex]

[tex]V =\sqrt{\dfrac{2\times 400 \times 10^{-6}}{2\times 10^{-6}}}[/tex]

[tex]V =\sqrt{400}[/tex]

V = 20 V

so , the capacitor voltage is V = 20 V