Which one of the following theorems becomes important if the circuit has sources operating at different frequencies?

Solution:

• The Super Position Theorem becomes important for the circuits having sources operating at different frequencies.
• In this case, since the impedances depend on frequency, we must have a different frequency-domain circuit for each frequency.
• Both thecircuit should be analyse separately and all the calculations for current, voltage and power should be done accordingly.

Important Points The power consumed by a element of the circuit can be added directly to know the total power consumed if the circuit is operating under different frequencies.

Mistake Points Do not ry to add current and voltage calculated with two different frequencies in phasor domain. Add them in time domain only to avoid the mistake.