This is the basic common emitter amplifier.I have read that polarized capacitors should have proper polarity connected to terminals of DC voltage source and they may blow off if they are connected in a wrong way and the polarized capacitors cannot be used with AC voltage source.
But I have been asking myself how does a polarized capacitor can be used in this below circuit because we have an AC signal as input which is to be amplified and this AC signal passes through C1 capacitor.During the positive cycle the polarities are matched but when the AC signal is negative cycle the polarities doesnt match and capacitor should blow off but that doesnt happen. I was trying to figure it out the reason.Could anyone help me with this Thanks.I know this must be a basic question to understand.
I have been said that Capacitors are used to block DC and allows only AC.We block DC so that the operating point does not shift but Iam unable to understand where the DC signal comes from. Does an AC signal has dc components in it? or may be some other reason? if so can anyone provide me some good link.Thanks