Decibel || Why -3dB || half power point || Is it -3dB always || 0 dB

It explains how decibel came into existence.It also describes significance of 3dB and -3dB.The meaning of half power point is discussed.The power ratio and voltage ratio is explained with example.
Meaning of -3dB band width.
Should we take always -3dB
0dB does not mean value is 0.It is reference value.

[@johnsmith20407]

It is awesome Video. Well explained and very helpful.

[@deepsati51]

very nice explanation
😇

[@mrtusharmohitepatil7398]

Thanks a lot 😊

[@mrtusharmohitepatil7398]

Thank you Kristopher

[@kristopherweber5551]

This is a very helpful video, thank you

[@marred0574]

Thanks !!! Just the explanation i was looking for !!!

[@dharmikmistry8781]

Thank you sir 😊

[@prasadadavi6618]

Too good sir... You have made my day. I wish to meet you at your convenience sir.

[@mrtusharmohitepatil7398]

Thank you

[@bpawansindhe992]

thank you

[@arunkram86]

Nice and Simple Explanation 👌👌👌

[@mrtusharmohitepatil7398]

Thank you

[@sreemukhikottada3518]

awesome clearly explained

[@mrtusharmohitepatil7398]

Thanks

[@yennamveni3790]

Why it becomes unstable when it is less than -3db sir?!!!!!

[@Mehraj_IITKGP]

Sir, at 8:52 how did you get Vo=root(2)? Shouldn't be Vo=10^(3/20) which is about 1.14? Have you written it for sake of convenience?

[@johnsmith20407]

I think he did it correctly. If you notice, 3/20=0.15 and 10^0.15=1.41. I hope that will help. Good luck.

[@Mehraj_IITKGP]

@@johnsmith20407 Yes, 1.41 is correct, but we cannot write directly write Vo=sqrt(2). Since 10^0.15 and sqrt(2) are not exactly the same. He may have used this as an approximation, but this may create confusion.

[@johnsmith20407]

@@Mehraj_IITKGP I agree. I honestly did the calculation before I finished the video. I think that's why I probably did not get confused. He probably wanted us to have an easier number to memorize so he used sqrt(2).