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Kirchhoff's theorem Kirchhoff's first law (or "node law") is an expression of the conservation of electrical charge in a node of an electrical network. Definition: The sum of the currents of the (continuous) currents entering a network node is equal to the sum of the intensities of the currents flowing out of the same node. Its intensity is measured in amperes. Q1 + Q4 = Q2 + Q3 or it can also be written as electrical charges: i1 + i4 = i2 + i3 |
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Enter 3 values and find out the result if we apply Kirchhoff's first law | ||
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| Kirchhoff's laws | |||
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Kirchhoff's laws express how to conserve electricity in an electrical circuit. They were enunciated and developed by the German physicist Gustav Robert Kirchhoff. These theorems apply to direct current electrical networks. An electrical network (electrical circuit) is composed of: network branches (circuit), network nodes (circuit) and network meshes (circuit). Network node: represents the place where at least 3 conductive branches (sides) of the network meet. A network branch represents a unilateral conducting distance between 2 successive nodes. Mesh: is a closed polygonal line consisting of 3 or more sides of the net. Kirchhoff's second law Along the contour of a mains eye, the algebraic sum of the electromotive voltages of the sources is equal to the algebraic sum of the products between the current intensity and the total resistance on each side. v1 + v2 + v3 = v4 |
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