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A hobbyist building a radio needs a 150-? resistor in her

Chapter 21, Problem 42P

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QUESTION:

Problem 42P

A hobbyist building a radio needs a 150-Ω resistor in her circuit, but has only a 220-Ω, a 79-Ω, and a 92-Ω resistor available. How can she connect these resistors to produce the desired resistance?

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QUESTION:

Problem 42P

A hobbyist building a radio needs a 150-Ω resistor in her circuit, but has only a 220-Ω, a 79-Ω, and a 92-Ω resistor available. How can she connect these resistors to produce the desired resistance?

ANSWER:

Step 1 of 3

Here we need to connect the given resistors ,  and  in order to produce  a equivalent resistance of .

In order to have a equivalent resistance of , the first two resistors must be parallel to each other and they must be connected in series with third resistor as shown in the figure below.

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