This means there is a reactive component, either inductive or capacitive, to the load.
Amplitude
Voltage amplitude is the maximum value of a voltage.
Because the only opposition to current flow is the resistance of the circuit. This is because, at resonance, the vector sum of the inductive and capacitive reactances is zero.
It is define as twice the maximum symetrical short circuit current.
You are, presumably, referring to alternating current, in which case the 'maximum' current is the peak or amplitude of the waveform. The 'average' value of current is zero, because the average value of the first half of each cycle is negated by the average value over the second half of each cycle. This is why a.c. currents and voltages are always expressed in 'root-mean-square' (r.m.s.) values which is the value of an a.c. current that does the same amount of work as a given value of d.c. current. The r.m.s. value for a sinusoidal current (and voltage, as voltage and current are proportional) is 0.707 times the peak or maximum value.
Amplitude
If you are referring to an a.c. current, then the maximum current is the amplitude of its waveform. For a sinusoidal waveform, the amplitude of an a.c. current is its root-mean-square value, divided by 0.707. For example, an a.c current with an rms value of, say, 10 A will have an amplitude of 14.14 A,
The maximum current rating for the circuit breaker is 150 amps.
The maximum current capacity of a 100 amp circuit breaker is 100 amps.
The maximum current capacity of an 80 amp circuit breaker is 80 amps.
The maximum current rating for a 30 amp circuit breaker is 30 amps.
The maximum current rating for a 15 amp circuit breaker is 15 amps.
Inside the circuit loop between the inductor and capacitor the current will be at maximum. Outside the circuit the current through the LC tank circuit will be at minimum. It depends on where you are measuring it.
The maximum current capacity of a 30 amp breaker for a 240v circuit is 30 amps.
The maximum current capacity of a circuit breaker rated at 150 amps is 150 amps.
The maximum voltage formula for a circuit is V I R, where V is the voltage, I is the current, and R is the resistance.
Maximum.