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Describe an experiment to show how a capacitor is discharged.

Describe an experiment to show how a capacitor is discharged.

Answers

sharon
Apparatus :
A charged capacitor, resistor, galvanometer, switch and connecting wires.
42420191038.png

Procedure
- Set up the apparatus as shown above.
- Close the switch and record the values of current at various time intervals in the table below.
42420191040.png
- Plot a graph of current, I against time, t.

Observations
The value of current is seen to reduce from maximum value to zero when the capacitor is fully discharged. The galvanometer deflects but in the opposite direction to that during charging.
During discharging, the p.d. across the capacitor reduces to zero when the capacitor is fully discharged. The graphs below show the variation between current, I and time, t and between the p.d across the capacitor and time, t.
42420191044.png
A graph of charge in the capacitor, Q against time, t during discharging also appears like that of p.d against time i.e. p.d across the capacitor is directly proportional to the charge stored.
sharon kalunda answered the question on April 24, 2019 at 07:45

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