The amplitude of harmonic voltage fluctuations is equal to ..

The amplitude of harmonic voltage fluctuations is written as U.
The amplitude of harmonic oscillations of the voltage across the capacitor is written as, Um.
The first is found by the formula:
U = Um / √2;
The second is a standard value that you just need to know, Um = 10.

We can substitute in the formula:
U = Um / √2;
U = 7.07 B



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