According to Kirchoff's current law,:

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RRB ALP Mechanic Radio & TV 23 Jan 2019 Official Paper (Shift 3)
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  1. the sum of the currents entering a node = the sum of the currents leaving the node
  2. the sum of the potential differences across all elements = 0
  3. the total current is directly proportional to the applied voltage
  4. the sum total of all the currents in a loop = 0

Answer (Detailed Solution Below)

Option 1 : the sum of the currents entering a node = the sum of the currents leaving the node
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Detailed Solution

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Concept:

Kirchhoff’s law is applicable to the junction in a network. It is not applicable for time-varying magnetic fields.

Kirchhoff’s Current Law (KCL):

  • This law is also known as the junction rule or current law (KCL). According to it the algebraic sum of currents meeting at a junction is zero i.e. Σ i = 0.


F2 P.Y Madhu 16.04.20 D 3

  • In a circuit, at any junction, the sum of the currents entering the junction must be equal to the sum of the currents leaving the junction i.e., i1 + i3 = i2 + i4
  • This law is simply a statement of “conservation of charge” as if the current reaching a junction is not equal to the current leaving the junction, the charge will not be conserved.
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