What is the response of inductor and capacitor for ac and dc voltages? Balajee Seshadri Balajee Seshadri, Electrical Engineer working in Electronics Field Answered Nov 16, 2015 Let us try to understand the Inductor and Capacitor in a different method than the regular method. Both Inductor and Capacitor are variable resistor like Rheostat. In Rheostat the Resistance manually changed. In Capacitor and Inductor, the resistance is varied using frequency of the signal. Fixed Resistor - The Value between A & B is fixed. Variable Resistor - The Value between A & C can be changed. When the position of C reaches the position of A the resistance between A & C becomes 0. When the position of C reaches the position of B the resistance becomes Maximum. Generally we know that in rheostat we change the position of C manually. But in capacitor and Inductor the position of C is controlled by the frequency. In Capacitor the resistance (Reactance) is equal to 1/2πfC. In Capacitor the R is mentioned as Xc. When value of f is 0 (DC) the resistance is ∞. When the value f reaches high value (i.e. High frequency AC signal) the value of resistance reaches 0. In Indusctance the resistance (Reactance) is equal to 2πfL. In Inductor the R is mentio

25 june 2017.

What is the response of inductor and capacitor for ac and dc voltages?

Balajee Seshadri, Electrical Engineer working in Electronics Field

Answered Nov 16, 2015

Let us try to understand the Inductor and Capacitor in a different method than the regular method.

                   Both Inductor and Capacitor are variable resistor like Rheostat.

                   In Rheostat the Resistance manually changed.

                   In Capacitor and Inductor, the resistance is varied using frequency of the
                    signal.

                   Fixed Resistor - The Value between A & B is fixed.

                                           

                 Variable Resistor - The Value between A & C can be changed.

                  When the position of C reaches the position of A the resistance between A & C becomes 0. When the position of C reaches the position of B the resistance becomes Maximum.  Generally we know that in rheostat we change the position of C manually. But in capacitor and Inductor the position of C is controlled by the frequency.

                  In Capacitor the resistance (Reactance) is equal to 1/2πfC.  In Capacitor the R is mentioned as Xc.

        When value of f is 0 (DC) the resistance is ∞. When the value f reaches high value (i.e. High frequency AC signal) the value of resistance reaches 0.

         In Indusctance the resistance (Reactance) is equal to 2πfL.  In Inductor the R is mentioned as XL.

        When value of f is 0 (DC) the resistance is 0. When the value f reaches high value (i.e. High frequency AC signal) the value of resistance reaches high value.

This same method can be used for Transistor, Themistor, etc.

         I did not go deep into Capacitor and Resistor. I tried explain in top level. If you need any more details write a comment. We can discuss more.

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