Aim -
To observe the variation of the current through, and the
p.d. across the capacitor during the charge and discharge cycle. |
Instructions |
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The capacitor is discharged and the switch is open. |
- Click the red buttoned switch to close the switch and start the
timer.
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- Record values of current I and p.d.
V every 10 seconds until the measured p.d. becomes
constant
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- Plot graphs of current I and p.d.
V against time as the capacitor charges.
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- Describe the change in the current and p.d. as the capacitor
charges.
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- Click on the button to change the circuit to allow the capacitor to
be discharged. The capacitor is initially fully charged and the
switch is open.
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- Click the red buttoned switch to close the switch and note values
for current I and p.d. V for the
capacitor every 10 seconds
|
- Plot graphs of current I against p.d.
V against time as the capacitor discharges.
|
- Explain the change in current and p.d. as the capacitor discharges.
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- Compare the direction of current during the charging and discharging
cycle and explain any differences.
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Copyright Physics Support
Materials 2000 |