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1.3. two capacitors of 3 microfarads and 6 microfarads respectively are connected in series. This combination is then connected in parallel with a 4 microfarads capacitor across a 200 volts DC supply. Calculate the total change, capacitance, the charge across the series capacitors and potential difference (PD) across each of the series capacitors.
asked Mar 30, 2015 in PHYSICS by anonymous

1 Answer

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Step 1:

The two capacitors  are in series.

Consider be the total series capacitance.

Now Find the total capacitance.

Consider be the total capacitance.

Here are in parallel.

So .

The total capacitance is .

Step 2:

Find the total charge image on the circuit.

Voltage across the circuit is 200 V.

image

The total charge is image.

In parallel circuit, voltage is same and charge will change.

Find the charge across the series capacitance.

So image.

image

The charge across the series capacitance is image.

Step 3:

Find the potential difference across the each of the series capacitance.

In series circuit, charge is same and voltage will change.

Find the voltage across the capacitor image.

image

Find the voltage across the capacitor image.

image

The voltage across the capacitors are image.

Solution :

The total capacitance is .

The total charge is image.

The charge across the series capacitance is image.

The voltage across the capacitors are image.

answered Mar 30, 2015 by joseph Apprentice
edited Mar 30, 2015 by joseph

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