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Question 9: Why we use Kirchhoff’s law for circuit problems solution?  Explain its rules for circuit solution by giving proper example.

Answer

Most often we come across electric circuits which cannot be simplified as series or parallel combination circuits. In such circuits, either there are more than one emf sources or the resistors are connected in a complicated manner. Ohm’s law cannot be applied to such complicated circuits.

German Physicist, Gustar Robert Kirchhoff gave two laws applicable in such situations and the unknown quantities can be easily found out by the application of these laws.

Applying Kirchhoff’s law to practical circuits, we adopt the following rules as solving strategy.

Solve the equations for unknown quantities.

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