Rectifiers and Capacitors: GCSE revision

[@Sabzworld77]

i wish u were my physics teacher.... u r a life saver

[@ricorico33]

The best things out of England: Isaac Newton, beatles and you. Thanks...

[@brendawilliams8062]

Thankyou for beautiful the wonderful teaching style you naturally promote.

[@kharaforlife8511]

thank you sir these videos are very useful

[@mahmoudm451]

I agree that when we replace 1 atom/million of silicon atoms with phosphorus then the number of electrons will increase since phosphorus has more electrons, but phosphorus has also more protons, so how will that make it more negatively charged?

[@Allthingstech3108]

Hi you seem to be saying that an n-type Semiconductor is"slightly negative" and P-type positive,well that's not true an n-type has more free electrons compared to p type yes but both p-type and n-type are NEUTRAL because as you rightly said you are just replacing one atom of Si with some other trivalent (p-type) or pentavalent (n-type) atom,hence the no of protons =no of electrons in p type as well as n type so they are neutral.

[@dumass00072]

Wobble= Ripple. Having the right word to search with makes a world of difference.

[@drgeek2944]

great video as usual!!! :D But why does a bulb flash when you connect it to a charged capacitor shouldn't it just stay glowing until the capacitor has lost all of its charge ?

[@DrPhysicsA]

The capacitor is chosen so that it discharges very quickly and produces a very bright flash. You are right that the capacitor will lose all its charge but it does this very quickly.

[@drgeek2944]

oh ok :) thank you for your help, keep up the great work !

[@ChubbyChiBee]

Thank You (: great explanations

[@DineshNuthalapati]

High Voltage AC --> Transformer --> Low Voltage AC --> Diode (Full wave Rectifier) --> Pulsating DC --> Capacitor (Low pass filter) --> Smooths Pulsating DC --> Regulator (Zener Diode) --> Pure DC

[@shaimashakhatreh8909]

Thank you !