Determine the voltage across the capacitor, Physics

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In the circuit shown in Figure, with the switch in position 1, the capacitor is uncharged.

If he switch is moved to position 2 at time t =0s, measure

(i) The initial current through the 0.5MΩ,

(ii) The voltage across the capacitor when t =1.5s, and

(iii) The time taken for the voltage across the capacitor to reach 12V

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