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Most Important Selected Qs for JEE AdvancedPhysicsAlternating Current

Paragraph: Two capacitors of capacitance C and 3 C are charged to potential difference V ₀ and 2 ~V ₀ respectively and connected to an inductor of inductance L as shown in the figure. Initially the current in the inductor is zero. Now the switch S is closed. Question: Potential difference across capacitor of capacitance 3 C when the current in the circuit is maximum

Options

  1. ACV ₀ 4
  2. B3 CV ₀ 4
  3. C5 CV ₀ 4
  4. DNone of these

Correct answer

C. 5 CV ₀ 4

Step-by-step solution

When current is maximum di dt =0 emf across L =0 and potential difference across the capacitor will be same. From conservation of charge aligned & 3 C V+C V=6 CV ₀- CV ₀ & V = 5 CV 4 aligned Loss in energy of capacitor = energy stored in inductor I_ = 3 V₀ 2 3 C L

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