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What happens to the energy stored in a c...

What happens to the energy stored in a capacitor if after disconnecting the battery, the plates of a charged capacitor are moved farther

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With the battery still connected, increasing the separation between the plates decreases the energy stored in the charged capacitor.
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Knowledge Check

  • The enrgy of a charged capacitor is U. Another identical capacitor is connected parallel to the first capacitor, after disconnecting the battery. The total energy of the system of these capacitors will be

    A
    `(U)/(4)`
    B
    `(U)/(2)`
    C
    `(3U)/(2)`
    D
    `(2U)/(4)`

  • A parallel plate capacitor is charged and the charging battery is then disconnected. If the plates of the capacitor are moved farther apart by means of insulating handles:

    A
    (a) the charge on the capacitor increases.
    B
    (b) the voltage across the plates increases.
    C
    (c) the capacitance increases.
    D
    (d) the electrostatic energy stored in the capacitor increases

  • A capacitor is charged with a battery and energy stored is U. After disconnecting battery another capacitor of same capacity is connected in parallel with it. Then energy stored in each capacitor is:

    A
    U/2
    B
    U/4
    C
    4 U
    D
    2 U

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