Which of the following is a direct application of Kirchhoff’s Current Law (KCL) in an electrical circuit?

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  1. The total voltage across a series circuit is equal to the sum of individual voltages.
  2. The sum of voltages across all parallel components is constant.
  3. The total power delivered to a circuit equals the sum of power losses in each component. 
  4. The sum of all currents entering a junction equals the sum of all currents leaving the junction. 

Answer (Detailed Solution Below)

Option 4 : The sum of all currents entering a junction equals the sum of all currents leaving the junction. 
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Detailed Solution

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Concept:

  • Kirchhoff’s Current Law:  The total current entering a junction or a node is equal to the charge leaving the node as no charge is lost.
  • The algebraic sum of every current entering and leaving the node has to be null. This property of Kirchhoff law is commonly known as Conservation of charge.
  • Node: Node is a point in a network where two or more circuit elements are connected.

I1 + i2 + i3 + i4 + i5 = 0

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