Q. For extremely low frequencies, RC coupling is not used because of _
Solution:
Xc = the electrical size of coupling capacitor
Relation of Xc with the signal frequency (f):
Xc = 1 Xc is inversely proportional to f.
At low frequencies, Xc becomes very large; output reactance of capacitor increases.
The voltage across load resistance also reduces because some voltage drop takes place across Xc.
Thus output voltage reduces. Therefore gain is very low.
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