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Chapter 25: Q7Q (page 739)

For each circuit in Fig. 25-21, are the capacitors connected in series, in parallel, or in neither mode?

Short Answer

Expert verified
  1. The capacitors in figure (a) are in series
  2. Thecapacitors in figure (b) are in parallel
  3. The capacitors in figure (c) are in parallel.

Step by step solution

01

The given data

Figure 25-21 is given.

02

Understanding the concept of the capacitor connection

Analyzing circuits given in Fig.25-21, we can note whether the current is dividing or not in it. From this, we can predict whether the capacitors are connected in series, in parallel, or neither mode.

03

Calculation for predicting the capacitors connection

In Fig. 25-21(a), we can see that there is only one path of current and the current is not dividing.

Therefore, the capacitors in figure (a) are in series.

In Fig. 25-21(b) and (c), we can see that, the current is dividing intol1 and l2.

Therefore, the capacitors in figures (b) and (c) are in parallel.

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Most popular questions from this chapter

The parallel plates in a capacitor, with a plate area of 8.50cm2and an air filled separation of 3.00 mm, are charged by a 6.00 Vbattery. They are then disconnected from the battery and pulled apart (without discharge) to a separation of 8.00 mm. Neglecting fringing, (a) Find the potential difference between the plates (b)Find the initial stored energy (c)Find the final stored energy (d)Find the work required to separate the plates.

Figure 25-22 shows an open switch, a battery of potential difference, a current-measuring meter A, and three identical uncharged capacitors of capacitance C. When the switch is closed and the circuit reaches equilibrium, what is (a) the potential difference across each capacitor and (b) the charge on the left plate of each capacitor? (c) During charging, what net charge passes through the meter?

A cylindrical capacitor has radii aand bas in Fig. 25-6. Show that half thestored electric potential energy lieswithin a cylinder whose radius isR=ab.

Figure 25-20 shows three circuits, each consisting of a switch and two capacitors, initially charged as indicated (top plate positive). After the switches have been closed, in which circuit (if any) will the charge on the left-hand capacitor (a) increase, (b) decrease, and (c) remain the same?

Figure 25-48 shows a parallel plate capacitor with a plate area A=7.89cm2and plate separation d = 4.62 mm. The top half of the gap is filled with material of dielectric constantk1=11.0; the bottom half is filled with material of dielectric constant k2=12.0. What is the capacitance?
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