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Chapter 19: Q29P (page 797)

The capacitor in Figure 19.65 is initially charged, then the circuit is connected. Which graph in Figure 19.66 best describes the current through the bulb as a function of time?

Short Answer

Expert verified

Figure (d) best depicts the current in the circuit.

Step by step solution

01

Given data

A fully charged capacitor is connected to a bulb.

02

Discharging of a capacitor

When a fully charged capacitor is connected in a circuit, electron flows from the negative to the positive plate, thus reducing charge in both plates.

03

Determination of the graph of the current in the circuit

As charges flow from the negative plate to the positive plate through the circuit, the net charge in the plates reduces. The fringe field due to the capacitor in the circuit also reduces thus reducing the current in the circuit. This continues until the capacitor is completely discharged and the current in the circuit is zero. This is best depicted by figure (d).

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Most popular questions from this chapter

The deflection plates in an oscilloscope are 10cm by 2cm with a gap distance of 1mm. A 100V potential difference is suddenly applied to the initially uncharged plates through a 1000 Ωresistor in series with the deflection plates. How long does it take for the potential difference between the deflection plates to reach 95V?

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