In a series-parallel circuit consisting of R1 and R2 in series and connected in parallel with R3, if R1 opens, then R2's voltage will:___________?
Correct answer: C. decrease
- A. increase
- B. remain the same
- C. decrease
- D. cannot tell
Explanation
Opening R1 breaks the series branch, so no current flows through R2 and its voltage drop becomes zero. Therefore, R2's voltage decreases from its original value.
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