# What is Components: Definition and 946 Discussions

An electronic component is any basic discrete device or physical entity in an electronic system used to affect electrons or their associated fields. Electronic components are mostly industrial products, available in a singular form and are not to be confused with electrical elements, which are conceptual abstractions representing idealized electronic components and elements.
Electronic components have a number of electrical terminals or leads. These leads connect to other electrical components, often over wire, to create an electronic circuit with a particular function (for example an amplifier, radio receiver, or oscillator). Basic electronic components may be packaged discretely, as arrays or networks of like components, or integrated inside of packages such as semiconductor integrated circuits, hybrid integrated circuits, or thick film devices. The following list of electronic components focuses on the discrete version of these components, treating such packages as components in their own right.

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1. ### How many independent components does a tensor have?

It's a 4th-dimensional 4th-rank tensor so at first we have ##4^4=256## components. According to the book, Given that ##R_{iklm}=-R_{ikml}## 256 components reduces to 96. But I cannot see how. For one pair of i,k 16 components are dependent. We have 12 pairs of i,k(for ##i≠k## becsuse for i=k...
2. ### Is grounding necessary when running off of batteries?

Hi all, playing with fancy e textiles and I wish to run a current through it. I don’t want to use mains, or d cell batteries. Can you point me in the right direction what components I could use and also how to get away with any grounding as it’s just a small area to put a current through...
3. ### Diffrence between resolving vector to components and find projections

I don't get what is the difference when I am asked to re-solve components and find projections to axes other than the Y and X I know that the parallelogram works for the first one and the dot product for the second but what's the diffrence!

5. ### Correct approach in resolving a force into its different components

I've already got the answer and the way to solve it (parallelogram), but I'm just wondering why I cannot use the technique I've learned in the lesson torque. Let's focus on the line AB, if I use what I've learned in torque, the components would be like this: To find the force component in...
6. ### Maxwell Stress components of the energy-stress-momentum tensor

Question: Solution: I need help with the last part. I think my numerical factors are incorrect, even if I add the last term it will get worse. What have I done wrong, or is there a better way to deal with this?
7. ### Vector sample problem -- Force components on a spring mechanism

Determine the amount and type (tensile or compressive) of the spring force so that the resulting force is a vertical force. Also get the resultant force. i find 60N (compressive) and resultant forces is 10800 is that correct?
8. ### Questions About Systems and Their Components

I have a terminological question: should system parts defined by functional interactions or by being inside (and including) the system’s physical boundary? System components are often defined as part of a system based upon their interactions that lead to the system’s success in achieving its...

21. ### I Confusion between vector components, basis vectors, and scalars

There is an ambiguity for me about vector components and basis vectors. I think this is how to interpret it and clear it all up but I could be wrong. I understand a vector component is not a vector itself but a scalar. Yet, we break a vector into its "components" and then add them vectorially...
22. ### Find frequency such that two components have same average power

(This is my first time posting here, sorry in advance for any difficulties. ) All componenets of same type has same magnitude, so e.g. the two resistors both have $R$ resistance. Given the difficulty of the previous exercises, I believe I'm over complicating the problem. However, here is what...
23. ### I Non-"00....0" components of charge density for a spin-s force field

It is given that the charge density of a particle of charge ##q_0##, world line ##z^{\mu}(\tau)## (and 4-velocity ##u^{\mu}##) in a spin-##s## force field is a ##s##-tensor\begin{align*} T^{\mu \nu \dots \rho}(x^{\sigma}) = q_0 \int u^{\mu} u^{\nu} \dots u^{\rho} \delta^4[x^{\sigma} -...
24. ### Confusion with force components

x component of ##F_3## ##F_{3x}= m a_x- F_{1x}-F_{2x}## = ##ma\cos 50-F_1\cos(-150)-F_2\cos90## y component of ##F_3## ##F_{3y}= m a_y-F_{1y}-F_{2y}## =##ma\sin50-F_1\sin(-150)-F_2\sin90## And so on… My question how we can represent it in diagram ##F_1\sin(-150)##. I suppose...
25. ### I What do the psi_3 and psi_4 components of the Dirac equation represent?

Forgive me if you've heard this song before, but I don't understand how to interpret the \psi_3 and \psi_4 components of the Dirac equation. For instance, at 8:27 of this video we see that while an electron at rest can be in a state like [1,0,0,0], the same electron as viewed from a...
26. ### The Force components acting on an object

Another user suggested adding the forces in the x and y direction then dividing by 1.4. Doing this for A) gave me 4.285 which was wrong any suggestions?
27. ### Find the value of ##\theta## when the Vx and Vy components are the same

The picture may be blurry. I couldn't take more less blurry picture hence, giving it. The question is : Find value of ##\theta## when ##V_x## component and ##V_y## component same. I was using a simple equation of vector. $$C=\sqrt{A^2+B^2+2AB\cos\theta}$$...

29. ### Relative intensities of fine-structure components in an alkali

Hi. I'm really stuck with this problem and would appreciate some help. For example, if i take the total intensity from the ##^2\text{P}_{3/2}## level, i get ##a+b##. Since ##b## is 9 times larger than ##a##, i get that the total intensity is ##10a##. This should then be proportional to the...
30. ### I Relative Motion & Local Frame’s Position - when projecting components

Does the position of the origin for the body’s rotating coordinate frame 1) stay fixed to the moving body or 2) does it stay fixed to the inertial frame, yet still able to rotate as the body rotates with the only restriction that it cannot translate with the body i.e. only affixed at the...
31. ### Rotating climbing wall - Components selection

Hello to all members! I'm looking for specific names of 3 mechanical components from the video: Component name 1: min 0:52 from the video Component name 2: min 1:01 from the video Component name 3 (the brake): min 3:53 from the video Perhaps anyone also has a link to the 3 components? I...
32. E

### I Components of *J in Kerr geometry

I am in the middle of a problem for the Kerr geometry, I need to do the integral ##\int_{\mathcal{N}} \star J## over a null hypersurface ##\mathcal{N}## which is a subset of ##\mathcal{H}^+##, where ##J_a = -T_{ab} k^b## and the orientation on ##\mathcal{N}## is ##dv \wedge d\theta \wedge...
33. ### I Why is (N dot N) different for magnitude than for X, Y, Z components?

I have to perform a calculation on my data. Here is an example of data from just one time step (data from other time steps would appear as additional rows). X Y Z Total 2 2 1 3 Total = SQRT(X2 + Y2 + Z2). The calculation I have to do is: (N • N), where "N" is an average. I tried...
34. ### Spherical components of a rotated operator

The operator is the ##T_{xyz}## component of the rank 3 tensor ##T=\vec{r}\otimes\vec{r}\otimes\vec{r}## whose Cartesian components are ##T_{ijk}=r_ir_jr_k##. This tensor ##T## also has spherical components ##T_{q}^{(k)}## where ##k=0,1,2,3##, which in principle can be related to their Cartesian...
35. ### Why do we need to increase voltage when overclocking PC components?

When we overclock CPU or GPU or RAM we also have to increase the voltage to achieve stable operation (provided we have adequate cooling). Why is that?
36. ### Question about vector components

The answer is D (60 degrees) and I understand how to get that answer. But this assumes that the new velocity's component of v/4 can form right angles with another component of the new velocity. So I'm confused whether vector components always form right angles to each other. When I searched...
37. ### Components of a Plane of Separation Problem

I have no idea how to solve this problem. The solution says that the component parallel to the plane of separation is conserved, i am not sure why. Seems to me that in the problem was assumed a special field, but not a generic field.
38. ### I Is a vector itself contra/covariant or just its components?

It seems most people say that a vector is either contravariant or covariant. To me it seems like contra/covariance is a property of the components of a vector (with respect to some basis) and not of the vector itself. Any basis {bi} has a reciprocal basis {bi} and any vector can be expressed...

40. ### Conversion between vector components in different coordinate systems

I am not completely sure what the formulas ##v_j = v^a\frac {\partial x^j} {\partial \chi^a}## and ##v^b = v^a\frac {\partial \chi^b} {\partial x^j}## mean. Is ##v_j## the j:th cartesian component of the vector ##\vec v## or could it hold for other bases as well? What does the second equation...
41. ### I The reference frame for angular momentum components

In which coordinate system the components of angular momentum are quantized? Better to say, if we can select the coordinate system arbitrarily, how the components of angular momentum, say z-component, are always ##L_z=m\hbar##?
42. ### I Transformation of vector components

The components of a vector ##v## are related in two coordinate systems via ##v'^\mu = \frac{\partial x'^\mu}{\partial x^\sigma}v^\sigma##. When evaluating this at a specific ##x'(x_0) \equiv x'_0##, how should we proceed? ##v'^\mu(x'_0) = \frac{\partial x'^\mu}{\partial...
43. ### Prove that the components of a vector can be written as follows

That is, the triad forms a basis.
44. ### B Components of Tangent Space Vector on Parametrized Curve

I'm studying 'A Most Incomprehensible Thing - Notes towards a very gentle introduction to the mathematics of relativity' by Collier, specifically the section 'More detail - contravariant vectors'. To give some background, I'm aware that basis vectors in tangent space are given by...
45. ### I Breaking an atom down in it's components.

Good day, I have a question about breaking an atom down in it's components. For an example we have a neutral 4-helium atom. The helium atom have a nucleus which contains 2 protons and 2 neutrons. Around the nucleus of the helium atom 2 electron orbits in the k-shell (according to Bohr's...
46. ### The important non-fundamental electrical components?

Through my 2 analog classes and 2 electronics classes I have learned about resistors, inductors, capacitors, BJTs, Mosfets, and FETS. What are some other fundamental components that I should be taking a look at? To add to this, I don't consider gates as fundamental because they are built up from...
47. ### B Animation of a standing wave formed by components from a free end

This is not a homework question, it is for my understanding so please do not answer this question with a question. I have found this great animated gif but it appears to be for a fixed end (notice wave inversions at the end). Has anyone seen a similar one for a free end? Many Thanks
48. ### I Scalar product of biharmonic friction with velocity components

I know that taking the scalar product of the harmonic (Laplacian) friction term with ##\underline u## is $$\underline u \cdot [\nabla \cdot(A\nabla \underline u)] = \nabla \cdot (\underline u A \nabla \underline u) - A (\nabla \underline u )^2$$ where ##\underline u = (u,v)## and ##A## is a...
49. ### Electronics Sourcing LED Components for High-Wattage COB Array (1200w - Woah)

Hello, I am looking to build an LED Panel for a film/video application. I have a few specific requirements in mind. 1) Color Accuracy beyond general CRI ratings. 2) Flicker Free to Camera (What specifications in LED drivers should I be looking for to ensure this flicker free application?) 3)...
50. ### A Electron frequency components during orbital tunneling

For example, we have this two potencial wells approaching, the electron is confined in one. the final appearance will be like this: THEN, if we know a wave packet is formed by many frequencies, but in a potencial well there are just few frequencies allowed, energy levels, so let's say, one...