In Figure 3B1, what is the voltage drop...

Question 1 / 20y2SZyBe8T8a9Xcqs610o

Question 1 of 20y2SZyBe8T8a9Xcqs610o

In Figure 3B1, what is the voltage drop across R1?

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Question 1 of 20

y2SZyBe8T8a9Xcqs610o

In Figure 3B1, what is the voltage drop across R1?

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🔍 Key Concepts

• Ohm’s Law (V = I × R) and how voltage, current, and resistance relate • How voltage divides in a series circuit vs how it behaves in a parallel circuit • Using the total supply voltage and known resistor values to find the drop across one resistor

💭 Think About

• Is R1 in series with the other resistors, in parallel, or part of a mixed network? How does that affect its share of the voltage? • Can you first find the total current in the circuit from the source voltage and total resistance, then use that to find the voltage across R1? • If there is more than one resistor in series with the supply, how is the total voltage divided according to their resistances?

✅ Before You Answer

• Make sure you correctly identify where R1 is located in the circuit in Figure 3B1 • Confirm you are using the correct total resistance when computing circuit current • Before choosing an answer, check that the sum of all series voltage drops equals the source voltage (within rounding).

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Question 1 of 20

In Figure 3B1, what is the voltage drop across R1?

9 volts.

7 volts.

5 volts.

3 volts.

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