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Capacitor Questions

Q10. A student sets up the circuit shown in the diagram.

(a)

(i) She moves the switch from X to Y. Explain what happens to the capacitor.

(2 marks)

(ii) Sketch a graph to show how current varies with time from the moment the switch touches Y. Indicate typical values of current and time on the axes of your graph.

(3 marks)

(iii) Describe how the graph would appear when the switch is moved back to X.

(2 marks)

(b) Calculate the maximum energy stored on the capacitor in this circuit.

(2 marks)

(c) The student wants to produce a time delay equal to the time it takes for the potential difference across the capacitor to fall to 0.07 of its maximum value. Calculate this time delay.

(2 marks)

(Total 11 marks)