What is the current through R2 of figure "B"...

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Question 1 of 205eccefa3bacbc34ba4d47f0f

What is the current through R2 of figure "B" of the circuit illustrated with the switch closed if the resistance of R1 is 2 ohms, R2 is 4 ohms, and R3 is 4 ohms and the battery voltage is 6 VDC? See illustration EL-0019.

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🔍 Key Concepts

• Parallel circuits and how voltage behaves across each branch • Using Ohm's Law (I = V/R) for a single resistor when voltage is known • Relationship between total circuit current and individual branch currents in parallel

💭 Think About

• In figure B, is R2 in series or in parallel with the other resistors once the switch is closed? How does that affect the voltage across R2? • If you know the battery voltage and the resistance of R2, what simple formula lets you find the current through just that one resistor? • Do you actually need the values of R1 and R3 to find the current in R2, or only a certain quantity that is the same for all parallel branches?

✅ Before You Answer

• Confirm from the diagram that R1, R2, and R3 are all connected across the same two points (parallel connection). • Make sure you are using Ohm’s Law with the correct voltage: use the voltage across R2, not the total current or total resistance first. • Before choosing an answer, quickly check that your current value is reasonable for a 6 V source and a 4‑ohm resistor (order of magnitude and units).

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