Question

In an oscillating L-C circuit the maximum charge on the capacitor is The charge on the capacitor when the energy is stored equally between the electric and magnetic field is :

• A. $\frac{Q}{2}$
• B. $\frac{Q}{\sqrt2}$
• C. $\frac{Q}{\sqrt3}$
• D. $\frac{Q}{3}$

Answer 1

Answer: (B)

$\frac{Q}{\sqrt2}$

Answer 2

$U_e = \frac{U_{max}}{2}$ $\therefore$ $\frac{q^2}{2C} = \frac{Q^2}{4C}$ $\therefore \, q = \frac{Q}{\sqrt{2}}$