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In the circuit shown the cells are ideal and of equal emfs, the capacitance of the capacitor is $C$ and the resistance of the resistor is $R. X$ is first joined to $Y$ and then to $Z$. After a long time, the total heat produced in the resistor will be
  • A
    equal to the energy finally stored in the capacitor
  • B
    half of the energy finally stored in the capacitor
  • C
    twice the energy finally stored in the capacitor
  • D$4$ times the energy finally stored in the capacitor
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