Question

Answer 1

a. Có: 

\(\omega=\dfrac{1}{\sqrt{lc}}\rightarrow10^6=\dfrac{1}{\sqrt{L.2.10^{-9}}}\)

\(\rightarrow L=5.10^{-4}\left(H\right)\)

b. Năng lượng dao động của mạch:

\(W=\dfrac{Q_0^2}{2C}=\dfrac{\left(2.10^{-6}\right)^2}{2.2.10^{-9}}=10^{-3}J\)

c. Có:

\(I_0=Q_0\omega=2.10^{-6}.10^6=2A\)

\(\rightarrow i=2\cos\left(10^6t+\dfrac{\pi}{2}\right)\)

d. Có:

\(W_C=\dfrac{q^2}{2C}=\dfrac{\left(10^{-6}\right)^2}{2.2.10^{-9}}=2,5.10^{-4}=\left(J\right)\)

\(\rightarrow W_L=W-W_C=7,5.10^{-4}\left(J\right)\)