Kirchhoff's Junction Law
Easyphysics
Kirchhoff's junction law expresses conservation of?
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Solution
Incorrect! Answer:
Charge
- Kirchhoff's First Law (KCL): At any junction (node) in an electrical circuit, the sum of currents entering the junction is equal to the sum of currents leaving the junction.
- Principle: Total current inflow = Total current outflow.
- Underlying Physics: Current is the rate of flow of charge. If the sum wasn't zero, charge would accumulate at a point indefinitely, which is impossible in steady-state conduction.
- Conclusion: This law is a direct consequence of the law of conservation of charge.
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About This Question
- Subject
- physics
- Chapter
- current electricity
- Topic
- kirchhoff's junction law
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Charge
- Kirchhoff's First Law (KCL): At any junction (node) in an electrical circuit, the sum of currents entering the junction is equal to the sum of currents leaving the junction.
- Principle: Total current inflow = Total current outflow.
- Underlying Physics: Current is the rate of flow of charge. If the sum wasn't zero, charge would accumulate at a point indefinitely, which is impossible in steady-state conduction.
- Conclusion: This law is a direct consequence of the law of conservation of charge.
This easy difficulty physics question is from the chapter current electricity, covering the topic of kirchhoff's junction law. It appeared in the 2025 exam.
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