Kirchhoff's 2nd rule is related to: ___________?
Correct answer: D. both "1" and "2"
- A. IR Drops
- B. Battery emf
- C. junction voltages
- D. both "1" and "2"
Explanation
Kirchhoff's second rule states that the algebraic sum of potential changes around a closed loop is zero, so the total battery emf equals the total IR voltage drops. Thus it involves both emf and IR drops. Students may choose junction voltages because Kirchhoff's first rule applies at a junction, not around a complete loop.
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