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Capacitors - Engineering

Q1:

A capacitor blocks ac but passes dc.

A True

B False

ANS:A - True

Xc = 1/2 * pi * f * c.

In the case of DC, f is zero.

So, xc = max or infinity hence open circuit or no flow of current so blocks DC.

In the case of an AC, f not zero.
So there exist xc a finite value hence current passes through it and allows AC.