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Chapter 27: Q5Q (page 794)

For each circuit in Fig. 27-20, are the resistors connected in series, in parallel, or neither?

Short Answer

Expert verified

Fig 27.20aseries

Fig27.20bparallel

Fig27.20cparallel

Step by step solution

01

Given

02

Determining the concept

Observe the fig. carefully. If the resistances are one below the other, they are connected in parallel and if connected one after the other, they are in series.

03

Determining whether resistances are in series, parallel, or neither

Here, in fig 27.20a,resistances are connected in series because they are wired one after another in a chain.

Hence, Series arrangement is shown below.

Here, in fig27.20b,resistances are connected in parallel because they are not wired one after another in a chain.

Hence, parallel arrangement is shown below.

Here, in fig27.20c,resistances are connected in parallel because they are not wired one after another in a chain.

Hence, parallel arrangement is shown below.

Therefore, if resistances are connected in a chain, they are in series, and the ones, which are not, are in parallel.

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Most popular questions from this chapter

A resistorR1is wired to a battery, then resistorR2is added in series. Are

(a) the potential difference acrossR1and

(b) the currenti1throughR1now more than, less than, or the same as previously?

(c) Is the equivalent resistanceR1ofR1andR2more than, less than, or equal toR1?

Figure 27-79 shows three20.0鈥坝�resistors. Find the equivalent resistance between points (a), (b), and (c). (Hint: Imagine that a battery is connected between a given pair of points.)

Question: In Figure,R1=R2=4.00惟andR3=2.50惟 . Find the equivalent resistance between points D and E.

(Hint: Imagine that a battery is connected across those points.)

Question: Figure shows a battery connected across a uniform resistor R-0. A sliding contact can move across the resistor from x = 0 at the left to x = 10 at the right. Moving the contact changes how much resistance is to the left of the contact and how much is to the right. Find the rate at which energy is dissipated in resistor as a function of x. Plot the function for 蔚=50V,R=2000惟,andR0=100惟, .

Question: In Fig. 27-72, the ideal batteries have emfs,蔚1=20.0V,蔚2=10.0Vand蔚3=5.0V,, and, and the resistances are each200惟. What are the (a) size and (b) direction (left or right) of currenti1? (c) Does battery 1 supply or absorb energy, and (d) what is its power? (e) Does battery 2 supply or absorb energy, and (f) what is its power? (g) Does battery 3 supply or absorb energy, and (h) what is its power?
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