Capacitors 2 µF, 3 µF and 5 µF are independently charged to 5 V, 20 V and 10 V respectively. After disconnecting the sources, their positive plates are joined at A and negative plates are earthed as shown. A 20 V battery and an initially uncharged 4 µF capacitor are then connected through switch S. After S is closed, answer the following.
Physics · Capacitor
Capacitors 2 µF, 3 µF and 5 µF are independently charged to 5 V, 20 V and 10 V respectively. After disconnecting the sources, their positive plates are joined at A and negative plates are earthed as shown. A 20 V battery and an initially uncharged 4 µF capacitor are then connected through switch S. After S is closed, answer the following.
Sub-question 1
Find the potential of junction A.
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Sub-question 2
Find the final charges on the four capacitors.
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