Question

a 10uf capacitor and a 20uf capacitor are connected in series across a 200v supply line. the charged capacitors are then disconnected from the line and reconnected such that those same polarities are connected to each other and no external voltage is applied. the potential difference across capacitors is

Answer 1

When capacitors are connected in series and disconnected from the line, the potential difference across the plates of each capacitor will be zero when they are reconnected.

Step-by-step explanation:

When capacitors are connected in series, the total capacitance (C) can be calculated using the formula:

1/C = 1/C1 + 1/C2.

In this case, C1 = 10 μF and C2 = 20 μF, so the total capacitance is:

1/C = 1/10 + 1/20

= 3/20.

Therefore, the total capacitance is 20/3 μF.

After disconnecting the capacitors and reconnecting them in series, the voltage across the plates of each capacitor will be the same.

Since no external voltage is applied, the potential difference across each capacitor will be zero.