1 Answer
Kirchhoff's third law is often referred to as Kirchhoff’s Voltage Law (KVL) or Kirchhoff's Current Law (KCL), but there isn't a commonly recognized "third" law of Kirchhoff in electrical engineering. However, since you're asking specifically for the third law, it's likely you're referring to either KVL or KCL. Here’s a quick overview of both:
1. Kirchhoff’s Current Law (KCL):
\sum I_{\text{in}} = \sum I_{\text{out}}
\]
2. Kirchhoff’s Voltage Law (KVL):
\sum V_{\text{in}} = \sum V_{\text{out}}
\]
If you’re referring to a third law beyond these two, could you clarify or specify further? It’s possible you may be asking about a less commonly mentioned principle.
1. Kirchhoff’s Current Law (KCL):
- This law states that the total current entering a junction (or node) in an electrical circuit is equal to the total current leaving the junction.
- Mathematically:
\sum I_{\text{in}} = \sum I_{\text{out}}
\]
- This is based on the principle of conservation of electric charge.
2. Kirchhoff’s Voltage Law (KVL):
- This law states that the sum of all the electrical voltages around any closed loop or circuit is equal to zero.
- Mathematically:
\sum V_{\text{in}} = \sum V_{\text{out}}
\]
- This law is based on the conservation of energy, where the energy supplied by sources is balanced by the energy consumed by resistive elements in the circuit.
If you’re referring to a third law beyond these two, could you clarify or specify further? It’s possible you may be asking about a less commonly mentioned principle.