The junction rule describes the conservation of which quantity? Note that this rule applies only to circuits that are in a steady state.

a. current
b. voltage
c. resistance

a) Current.

Explanation:

The "junction rule" (Kirchhoff's first law) says that the value of the electric current entering any point in the circuit must be the same as the one leaving it. This comes as a consequence of the conservation of charge, the electric charge that comes in must come out (when speaking about currents, per unit time).

resonant frequency