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Which of these statements articulate one of Kirchhoff's laws? (Select all that apply)

A) The voltage into a junction equals to voltage out of the junction
B) The sum of all currents around a loop is zero
C) The voltage drop across all elements in a circuit is the same
D) The current weakens as you move through each circuit element
E) The sum of all voltage drops around a loop is zero
F) The total current into a junction equals the total current out of the junction

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cjrodriguez89

Answer: E) and F)

Explanation:

E) In any closed loop, the sum of all voltage drops must be zero, as it is stated in the Kirchhoff Voltage Law (KVL).

This is a direct consequence of the energy conservation principle, as if it could be possible to return to the starting point in a loop with a different voltage, this energy could be used as a infinite energy source, which is against laws of nature, specially Thermodynamic's 2nd law.

F) At any junction, the sum of the currents into it, must be equal to the sum of the currents that leave the junction, as it is stated in the Kirchhoff"s Current Law (KCL).

This is a direct consequence of the charge conservation principle, as the charge can't  neither  be accumulated nor be destroyed at any point.

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