7.8 LC OSCILLATIONS
Chapter 7: Chapter 7 · PHYSICS PART-1 · EN medium
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We know that a capacitor and an inductor can store electrical and magnetic energy, respectively. When a capacitor (initially charged) is connected to an inductor, the charge on the capacitor and the current in the circuit exhibit the phenomenon of electrical oscillations similar to oscillations in mechanical systems (Chapter , Class XI). Let a capacitor be charged qm (at t = ) and connected to an inductor as shown in Fig. . . The moment the circuit is completed, the charge on the capacitor starts decreasing, giving rise to current in the circuit. Let q and i be the charge and current in the circuit at time t. Since di/dt is positive, the induced emf in L will have polarity as shown, i.e.
📖 NCERT Class 12 Physics Part 1 · Page 259
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We know that a capacitor and an inductor can store electrical and magnetic energy, respectively. When a capacitor (initially charged) is connected to an inductor, the charge on the capacitor and the current in the circuit exhibit the phenomenon of electrical oscillations similar to oscillations in mechanical systems (Chapter , Class XI). Let a capacitor be charged qm (at t = ) and connected to an inductor as shown in Fig. .
. The moment the circuit is completed, the charge on the capacitor starts decreasing, giving rise to current in the circuit. Let q and i be the charge and current in the circuit at time t. Since di/dt is positive, the induced emf in L will have polarity as shown, i.e., vb < va.
According to Kirchhoff’s loop rule, i
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