Kirchhoff's first law, applied at a junction, is a statement of the conservation of
Correct answer: B. charge
- A. energy
- B. charge
- C. momentum
- D. resistance
Explanation
The total current entering a junction equals the total leaving, because charge cannot accumulate at a point in a steady circuit. The second law, that the sum of the emfs around a loop equals the sum of the potential drops, expresses conservation of energy instead. Together they solve any network that series and parallel rules cannot.
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About Steady Current
Steady current is the continuous flow of charge at a constant rate through a conductor. The topic covers current, charge, potential difference, resistance, Ohm's law, resistivity and electrical power, along with series and parallel circuits, while distinguishing conventional current direction from electron motion.
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