JAMB Physics 2025 Objective — Question 40
Question 40 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2025 Objective paper, with the correct answer and a full explanation.
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Kirchhoff's first law (junction rule) states that:
- A. sum of currents entering = sum leaving a junctionCorrect
- B. sum of all PDs in a loop is zero
- C. total resistance in series = sum of individual
- D. voltage across conductor ∝ current
Explanation
KCL is based on conservation of charge: currents in = currents out at a junction.
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