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NEET 2026 · Charge Sharing & Loss of Energy

Charge Sharing & Loss of Energy question from NEET 2026

Q4NEET 2026Easy

Charge Sharing & Loss of Energy

Consider two uncharged capacitors of equal capacitance 200 pF. One of them is charged by a 100 V supply and disconnected. Now this capacitor is connected to the uncharged capacitor. The amount of electrostatic energy lost in the process is:

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Answer: (a)

  1. Initial energy Ui=12CV2=12×200×10−12×1002=1.0×10−6U_i = \frac{1}{2}CV^2 = \frac{1}{2} \times 200 \times 10^{-12} \times 100^2 = 1.0 \times 10^{-6} J
  2. For equal capacitors half the energy is lost: ΔU=14CV2\Delta U = \frac{1}{4}CV^2.
  3. ΔU=0.5×10−6\Delta U = 0.5 \times 10^{-6} J, so the answer is (a).
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