a. State one use of a capacitor in a simple electric circuit.
b. This is a circuit used to investigate the discharge of a capacitor, and a graph showing the change in current with time when the capacitor is discharged.

i. Deduce the resistance R of the resistor.
ii. Explain why the current decreases as the capacitor discharges.
iii. The charge on the capacitor is equal to the area under the graph.
Estimate the charge on the capacitor when the potential difference across it is 9.0 V.
iv. Calculate the capacitance of the capacitor.

Transcribed Image Text:

I/ mA 15, A B 10- 9.0 V R 5- 2 6 10 12 t/s Figure 23.21 4.