Sinusoidal Voltage and frequency?

[iflabs]

Does the frequency of a sinusoidal voltage or current attribute anything? Maybe more power?

All I know so far is that you can filter certain frequencies out with filter circuits.

 

[deakie]

yes...when working with tuned circuits, your maximum power will be at the frequency of the tuned circuit.

nearly all systems have a frequency response and if you match your input signals to that of the system, then you will have the least resistance or should i say impedance and maximum power transfer.

Filters are used to discriminate between signals. some you want to get rid of and some you want to keep.

 

[berkeman]

Does the frequency of a sinusoidal voltage or current attribute anything? Maybe more power?

All I know so far is that you can filter certain frequencies out with filter circuits.

In addition to deakie's comments, if you are putting a sinusoidal voltage across a capacitance, then yes, the higher the frequency, the higher the power required to maintain the same peak-to-peak voltage.

Quiz Question for iflabs -- starting with the equation relating current and voltage in a capacitor ( I = C dV/dt ), show that my statement is true.