Recent questions in Electric current
lurtzslikgtgjd 2022-05-13

What is the electric current produced when a voltage of 9V is applied to a circuit with a resistance of $99\mathrm{\Omega }$?

indimiamimactjcf 2022-05-13

Under electrostatic conditions, there is no electric field inside a solid conductor. True or false?

kromo8hdcd 2022-05-13

What is the electric current produced when a voltage of 24V is applied to a circuit with a resistance of $6\mathrm{\Omega }$ ?

llunallenaipg5r 2022-05-10

In a circuit, the supplied voltage is 1.5 volts, and the resistor value is 3 ohms. What is the current in the circuit?

Ashley Fritz 2022-05-10

If a current of 8A passing through a circuit generates 14W of power, what is the resistance of the circuit?

Nubydayclellaumvcd 2022-05-10

What is the strength of the electric field at the position indicated by the dot in the figure?photoWhat is the strength of the electric field at the position indicated by the dot in the figure?$E=\overline{\phantom{\rule{1em}{0ex}}\phantom{\rule{1em}{0ex}}}\frac{N}{C}$What is the direction of the electric field at the position indicated by the dot in the figure? Specify the direction as an angle above the horizontal line.$\theta ={\overline{\phantom{\rule{1em}{0ex}}\phantom{\rule{1em}{0ex}}}}^{\circ }$ .

Waylon Mcbride 2022-05-10

Coaxial cable has radius a of copper core and radius b of copper shield. Between there is an insulator with specific resistivity $\zeta$. What is the resistance of this cable with length L between the core and the shield?First, I tried to solve this like this: $dR=\zeta \frac{l}{S}$In our case the length is dr, and therefore I suppose that the area of this ring is 2πrdr: $dR=\zeta \frac{dr}{2\pi rdr}$ The solution sheet says: $dR=\zeta \frac{dr}{2\pi rL}$I know that something is wrong with my equation, because dr goes away and then I cannot integrate from a to b. But why is in the solution L instead of dr? As I understand problem instruction L= b-a. And therefore L=dr which doesn't make sense to me.

lifretatox8n 2022-05-10

When a 120 V potential difference is applied across a $30\mathrm{\Omega }$ resistance of electric device. What is the current through the electric device? What is the power of the electric device?

Aedan Gonzales 2022-05-10

This is kind of a stupid question and I am taking some risk of getting some down-votes here, but, I can't resist posting it. Suppose $\left({u}_{1},{u}_{2}\right)$ is an orthonormal basis for ${R}^{2}$, and let x be an arbitrary vector in ${R}^{2}$, then we can decompose x by projecting on ${u}_{1},{u}_{2}$, i.e.$\begin{array}{r}\left({u}_{1}^{T}x\right){u}_{1}\\ \left({u}_{2}^{T}x\right){u}_{2}\end{array}$Certainly we have$\begin{array}{r}x=\left({u}_{1}^{T}x\right){u}_{1}+\left({u}_{2}^{T}x\right){u}_{2}\end{array}$Looks like a simple problem, but how can I prove this?

London Ware 2022-05-09

What is the electric current produced when a voltage of 4V is applied to a circuit with a resistance of $80\mathrm{\Omega }$ ?

Annabel Sullivan 2022-05-09

I was looking at the data sheet for a copper cable and noticed the conductor resistance to be specified at around 5 mOhm/m. This is magnitudes higher than pure copper, which has a resistance in the order of 10 nOhm*m. Why is the resistivity so much higher?

velinariojepvg 2022-05-09

A circuit with a resistance of $6\mathrm{\Omega }$ has a fuse that melts at 8A. Can a voltage of 42V be applied to the circuit without blowing the fuse?

fetsBedscurce4why1 2022-05-08

If a current of 8A passing through a circuit generates 34W of power, what is the resistance of the circuit?

hyprkathknmk 2022-05-08

${V}_{P}-{V}_{O}={\int }_{P}^{O}E.dr$The equation is in one dimension and P and O are points on the x axis.The Electric field is oriented in the $+x$ direction ans has the formula $c\frac{1}{r}$ where c is a coefficient and r is the distance form the origin of the coordinate system.The vector ${\stackrel{\to }{r}}_{P}-{\stackrel{\to }{r}}_{O}$ has the same direction as that of the electric field.Now, Why do we put P below the integral and O above it? Can someone explain the equation for me?

velinariojepvg 2022-05-08

How much power is produced if a voltage of 8V is applied to a circuit with a resistance of $16\mathrm{\Omega }$ ?

Peia6tvsr 2022-05-08

In the grating equation $n\lambda =d\mathrm{sin}\theta$, the quantity $\theta$ will be determined in the lab using the angular scale on the experimental apparatus. using meter sticks and geometry/trigonometry. using a protractor.

Micah Haynes 2022-05-08

How can we evaluate${\int }_{0}^{1}\frac{{\mathrm{log}}^{2}\left(x+1\right)\mathrm{log}\left({x}^{2}+1\right)}{{x}^{2}+1}dx$Any kind of help is appreciated.

Kiersten Hodge 2022-05-08

What are limitations of ohms law?

deformere692qr 2022-05-08

The formula for resistivity is:$\rho =\frac{RA}{L}$where $\rho$ is resistivity, $R$ is resistance, $A$ is cross-sectional area, and $L$ is the length of the conductor.We can see from the formula that $A$ and $L$ are involved, why then does resistivity not depend on dimensions?

ga2t1a2dan1oj 2022-05-08

The equations are as follows:${\rho }_{a}\left(s\right)={s}^{2}{\int }_{0}^{\mathrm{\infty }}T\left(\lambda \right){J}_{1}\left(\lambda s\right)ds\phantom{\rule{2em}{0ex}}\left(4\right)$Where ${\rho }_{a}$ is the apparent resistivity and $T\left(\lambda \right)$ is a resistivity transform function. Using a Hankel Transform, we get:$T\left(\lambda \right)={\int }_{0}^{\mathrm{\infty }}{\rho }_{a}\left(s\right){J}_{1}\left(\lambda s\right)\left[\frac{1}{s}\right]ds\phantom{\rule{2em}{0ex}}\left(7\right)$New variables are then defined by$x=ln\left(s\right)\phantom{\rule{1em}{0ex}}and\phantom{\rule{1em}{0ex}}y=ln\left(\frac{1}{\lambda }\right)\phantom{\rule{2em}{0ex}}\left(8\right)$Substituting (8) in (7), we get$T\left(y\right)={\int }_{-\mathrm{\infty }}^{\mathrm{\infty }}{\rho }_{a}\left(x\right){J}_{1}\left(\frac{1}{{e}^{y-x}}\right)dx\phantom{\rule{2em}{0ex}}\left(9\right)$Please note that any missing equations were for another resistivity equation.

The practical use of the electric current problems is met basically everywhere even if you are not majoring in Engineering. Take an example of data programming and the use of safety (data transfer) questions when the data is being transferred from place to place via cloud storage solutions. The same is related to automation and logistics where the electric current equation will help to calculate the limitations and the available resources. See some answers to the questions dealing with the electricity principles to get a better idea of how it works and compare the existing solutions to your task objectives!