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For extremely low frequencies, RC coupling is not used because of ___________

For extremely low frequencies, RC coupling is not used because of ___________ Correct Answer Electrical size of the coupling capacitor

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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