She is a great teacher, what will really blow your mind is that she has a Bachelor's of Science in Cellular and Molecular Biology, & a PhD in Human/Medical Genetics degree to go with that hardcore Board diagnostics skills. How do you like her now?
In electronics the 2 fundamentals are Power = Volts x Current and Volts = Current x Resistance. Or P = VI and V = RI. Fundamentals says that at low voltage, if you have high current, your resistance will be low. Because I = V/R , so R needs to be lower that V for I to be high. BUT! With semi-conductors, resistance becomes a variable that can change based on several factors that includes a voluntary provoked and controlled changes by an other part of the circuit. This means, among other things, that R will be different if the circuit is powered or not. You cannot use an Ohmmeter on a powered circuit. But an Ohmmeter on the same unpowered circuit can lie to you. Understanding the circuit and your measurement instruments are keys to diagnostics. This is what Jessa is explaining.
wow she is at ifixit???????i thought she did not like ifixit???? i saw this something she posted about ifixit check out this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-XVXaxTVAkb8.html
interesting points ,if anyone else wants to discover pc repair try Saankramer Electronic Magazine System (just google it ) ? Ive heard some amazing things about it and my friend got great success with it.
The Peek-a-Boo action from behind the microscope is very distracting . Maybe you might be wheels on your seat/chair and face the class directly when 'talking'! Had to abandon this video...sorry. Also, lose the 'man-voice' for show...doesn't suit you.
