Capacitors A and B of 3 µF and 2 µF are charged to 100 V and 180 V respectively and connected as shown, with one lead of each free. The upper plate of A is positive and the upper plate of B is negative. An uncharged 2 µF capacitor C falls across the free ends and completes the circuit. Answer the following.
Physics · Capacitor
Capacitors A and B of 3 µF and 2 µF are charged to 100 V and 180 V respectively and connected as shown, with one lead of each free. The upper plate of A is positive and the upper plate of B is negative. An uncharged 2 µF capacitor C falls across the free ends and completes the circuit. Answer the following.
Sub-question 1
Find the final charges on capacitors A, B and C.
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Sub-question 2
Find the electrostatic energies before and after completion of the circuit.
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