Kirchhoff's two laws for electrical circuits are manifestations of the conservation
Correct answer: D. both charge and energy
- A. charge only
- B. both energy and momentum
- C. energy only
- D. both charge and energy
Explanation
Kirchhoff's laws, namely Kirchhoff's voltage law (KVL) and Kirchhoff's current law (KCL), are manifestations of the conservation of both charge and energy in electrical circuits.Incorrect options: (a) Charge conservation is reflected in Kirchhoff's laws, but they also encompass energy conservation.(b) Energy and momentum conservation are not directly related to Kirchhoff's laws.(c) While energy conservation is indeed part of Kirchhoff's laws, they also involve charge conservation.
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Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.
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