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Current Electricity — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsCurrent Electricity1 Mark
MCQ
Which among the following is true?
  • A
    According to Kirchhoff’s law, the current flowing towards a junction is equal to the voltage drop.
  • B
    According to Kirchhoff’s law, the current flowing towards a junction is equal to the resistance across the junction.
  • C
    According to Kirchhoff’s law, the current flowing towards a junction is equal to the current leaving the junction.
  • D
    According to Kirchhoff’s law, the current flowing towards a junction is equal to all the currents in the circuit.
✓

Answer

  1. According to Kirchhoff’s law, the current flowing towards a junction is equal to the current leaving the junction.

Explanation:

According to Kirchhoff’s first law, the current flowing towards the junction is equal to the current leaving the junction. Mathematically, this law can be expressed as ∑nK – 1 IK = 0 (where n is the number of branches carrying current towards or away from the junction)

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