In a certain three-branch parallel circuit, R1 has 12 mA through it, R2 has 15 mA through it, and R3 has 25 mA through it. After measuring a total of 27 mA, you can say that____________?

Correct answer: A. R3 is open

A. R3 is open
B. R1 is open
C. R2 is open
D. the circuit is operating properly

Explanation

If all branches were conducting, the total current would be 12 + 15 + 25 = 52 mA. The measured 27 mA equals 12 + 15 mA, showing that the 25 mA branch through R3 is open.

Written and checked by Zahid Hussain, MS Computer ScienceLast updated 16 September 2026

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In a certain three-branch parallel circuit, R1 has 12 mA through it, R2 has 15 mA through it, and R3 has 25 mA through it. After measuring a total of 27 mA, you can say that____________?

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