handling situations when properties are not always dependent

I'm currently struggling with a situation where I've defined a class with dependent properties. In this case my class is a circuit with properties: voltage , current, and resistance. I use a get method to obtain the power of the circuit. The code can be seen as:

 classdef circuit
      %CIRCUIT Summary of this class goes here
      %   Detailed explanation goes here

      properties
          voltage
          current
          Resistance
      end

      properties (Dependent= true,SetAccess = private)

         power 
      end

      methods
          function out = get.power(theCircuit)
              out = theCircuit.current^2 * theCircuit.Resistance;
          end
      end

end

In this case I can dynamically get the power based on the current and the resistance properties.

My question is, what is the best way to handle situations when I want to define a power and resistance and from that use a getter method to obtain the current?

Any help is greatly appreciated!