Kirchhoff's laws are the basis in electronics and electrical engineering. The first law of Kirchhoff is probably the simplest of the existing laws in the field associated with the flow of electric current. He says that if we combine all the electric currents that flow in and out of the node of the electrical circuit, then we get zero. Kirchhoff's second law is this: if you combine the EMF of all power sources, then their sum will be equal to the voltage drop across all loads of the given circuit of the electrical circuit.
In this video, we consider 1 and 2 Kirchhoff's laws on real examples. To repeat the experiments will need only three resistors of different denominations and two power supplies of different voltages. If you connect the power supplies and connect the series resistors connected to them, the total voltage of the power supplies will be balanced by the voltage drop on these resistors. It should be borne in mind that with a consonant connection of power sources, their emfs are added up, and with the counter one - are subtracted. Simplified, the essence of Kirchhoff's Law 2 is that the EMF of the current sources does not disappear anywhere, but is distributed on the loads, in proportion to their resistances.
12 сен 2018
