Electricity and electronics Definition and 13 Threads

Hi, I’m an undergraduate student interested in cognitive processes. I’m about to ask a very interdisciplinary question, and so hopefully I can find a physicists that can take on the challenge. What is the fundamental reason behind why modern electronic computers (transistor computers) are...

Homework Statement How do I calculate the current I3? Homework Equations I know that I1 = I2 + I3 and that I2 = 0.4 The Attempt at a Solution So we have a voltage source of 3.7V I would've thought that the equation for a clockwise circuit be 0.4R2 - 3.7 - 200I3 = 0 which gives me an answer...

Homework Statement Question: For the circuits shown in Fig. 6, voltage meters and ampere meters are used to measure the voltage across the load and their current flow. If the Red Probe is plugged into the “+” terminal of the voltage meter and ampere meter, which circuit(s) show both the...

Homework Statement (1) Name the waveform(s) that represent a periodical current flow. (2) Name the waveform(s) that represent a direct current. (3) Name the waveform(s) that represent a non-periodical alternating current. (4) Name the waveform(s) that represent a current with a non-positive...

Hello, I want something were I can find electric/electronic schemes and circuits to built by myself, starting from basics to complicated ones (with explanation, why and how it works). P.S. I'm also interested in books which involves other fields (eg. chemistry) and DIY projects

Hello, I've been building my own solar panel system and throughout this process I've accumulated a lot of questions. If anyone could help answer them I would greatly appreciate it! First I'll start off explaining what I have. A polycrystalline solar panel 17V 2.2A and a mono crystalline panel...

The following mechanism leads me to wander that a moving neutral object (compose from atoms) in vacuum may generates electric filed due to very small dipole moment. I propose that when atoms force to move in a certain direction the force propagates within the atom. A retardation in movements...

Homework Statement Everything is in the picture. Question 3(a) This is for preparation for a contest. http://i.imgur.com/FtiKaYw.jpg Homework Equations V=IR The Attempt at a Solution I calculated the total resistance of the first circuit and used that to evaluate V(AB). But this is in...

Hi Im studying electronics off the web (btw I am looking for a good online course). My background is in Biochemistry and I've gotten into programming (6+ years) and recently Arduino projects (1 year). I am trying to get a better handle on electricity. As I am reading about Ohms law here...

Well here's the problem carbon nanotubes possesses a electron - hole symmetry .my question is to what property of CNT'S does this symmetricity attribute to ? in otherwords if we dope this with a material with more electrons / holes what property will change ?

In my head, I'm using (delta)(gravitational potential energy) as an analogy to the (delta)(electrical potential energy). So, with a DC circuit with loads connected in series, we can observe a voltage drop across each load. Now, because the current remains the same throughout, it must mean that...

Homework Statement Find currents through M and N Homework Equations Current out must be current in. The Attempt at a Solution I think that it is simply 3 parallels running with 5A of current. So, M is in series with the 2A current thus also has 2A of current. Would N also be in series with...

So, recently I started learning about electronic components and then I started learning about semiconductors. The one which I've been having some real trouble to understand its function is the transistor. So I bought an electronics textbook called El ABC de La Electrónica (The ABC of Electronics...