Question

what are Kirchhoff's first rule and second rule??

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Answer 1

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Kirchhoff's first rule—the junction rule: The sum of all currents entering a junction must equal the sum of all currents leaving the junction. Kirchhoff's second rule—the loop rule: The algebraic sum of changes in potential around any closed circuit path (loop) must be zero.

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Answer 2

Kirchhoff's first rule (Current rule) :

The algebraic sum of the currents at any junction of a circuit if zero.

Kirchhoff's second rule (Voltage rule) :

In a closed circuit the algebraic sum of the products of the current and resistance of each part of the circuit is equal to the total emf included in the circuit.

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