Answering Electric Current Questions

High School
Physics
Electric current

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?

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

$V_{P} - V_{O} = \int_{P}^{O} E . d r$
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 ${\vec{r}}_{P} - {\vec{r}}_{O}$ 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 $16 Ω$ ?

Peia6tvsr 2022-05-08

In the grating equation $n λ = d \sin θ$ , the quantity $θ$ 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
$\int_{0}^{1} \frac{\log^{2} (x + 1) \log (x^{2} + 1)}{x^{2} + 1} d x$
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:
$ρ = \frac{R A}{L}$
where $ρ$ 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:
$ρ_{a} (s) = s^{2} \int_{0}^{\infty} T (λ) J_{1} (λ s) d s (4)$
Where $ρ_{a}$ is the apparent resistivity and $T (λ)$ is a resistivity transform function. Using a Hankel Transform, we get:
$T (λ) = \int_{0}^{\infty} ρ_{a} (s) J_{1} (λ s) [\frac{1}{s}] d s (7)$
New variables are then defined by
$x = l n (s) a n d y = l n (\frac{1}{λ}) (8)$
Substituting (8) in (7), we get
$T (y) = \int_{- \infty}^{\infty} ρ_{a} (x) J_{1} (\frac{1}{e^{y - x}}) d x (9)$
Please note that any missing equations were for another resistivity equation.

linziboobeary1o8p 2022-05-08

If a current of 4A passing through a circuit generates 16W of power, what is the resistance of the circuit?

Carley Haley 2022-05-07

Prove $2^{135} + 3^{133} < 4^{108}$

vulkanere64t6 2022-05-07

The current flowing in a wire is inversely proportional to the resistance of the wire. If the current is 5 amperes (A) when the resistance is 24 ohms ( $Ω$ ), for what resistance will the current be 8 amperes?

kadetskihykw 2022-05-01

The sides a,b,c of a $△ A B C$ are in GP whose common ratio is $\frac{2}{3}$ and the circumradius of the triangle is $6 \sqrt{\frac{7}{209}}$ .Find the longest side of the triangle.
I used law of sines
$\frac{a}{\sin A} = \frac{b}{\sin B} = \frac{c}{\sin C} = 2 R$
I took $a = a, b = \frac{2}{3} a, c = {(\frac{2}{3})}^{2} a$
which gives
$\frac{\sin A}{\sin B} = \frac{\sin B}{\sin C}$
I am stuck now,how to find the longest side a

kulisamilhh 2022-04-25

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

Waylon Mcbride 2022-04-12

The particle is falling down, and x is measured in down direction.
$x^{″} = g - k v^{4} ⟹ v \frac{d v}{d x} = g - k v^{4}$
Solving this I get
$\frac{1}{4 \sqrt{g k}} \log (\frac{\sqrt{k} v^{2} - \sqrt{g}}{\sqrt{k} v^{2} + \sqrt{g}}) = x + c$
It is falling from rest, i.e x=0,v=0, using this initial condition I get $\log (- 1)$ on the LHS. Is something wrong with the solution. I check that integral is correct.

Jaime Coleman 2022-04-12

Prove or Disprove that $| \frac{e^{2 i θ} - 2 e^{i θ} - 1}{e^{2 i θ} + 2 e^{i θ} - 1} | = 1$
This is a step in an attempt to solve a much larger problem, thus I'm fairly sure it's true but not absolutely sure. It looks like it should be simple but it's resisted all my attempts so far.

llunallenaipg5r 2022-04-12

What is the electric current produced when a voltage of 12V is applied to a circuit with a resistance of $55 Ω$ ?

Brooklynn Hubbard 2022-04-12

A circuit with a resistance of $8 Ω$ has a fuse with a capacity of 3A. Can a voltage of 36V be applied to the circuit without blowing the fuse?

Jordon Haley 2022-04-07

Ohm's law is represented by the equation $I = \frac{V}{R}$ . How would the current change if the amount of resistance decreased and the voltage stayed the same?

Justine Webster 2022-04-07

What is the electric current produced when a voltage of 24V is applied to a circuit with a resistance of $40 Ω$ ?

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!

Electric current

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