Recent questions in Electric current

Ohm's law
Answered

linziboobeary1o8p
2022-05-08

Ohm's law
Answered

vulkanere64t6
2022-05-07

Path of Least Resistance
Answered

kadetskihykw
2022-05-01

I used law of sines

$\frac{a}{\mathrm{sin}A}=\frac{b}{\mathrm{sin}B}=\frac{c}{\mathrm{sin}C}=2R$

I took $a=a,b=\frac{2}{3}a,c={\left(\frac{2}{3}\right)}^{2}a$

which gives

$\frac{\mathrm{sin}A}{\mathrm{sin}B}=\frac{\mathrm{sin}B}{\mathrm{sin}C}$

I am stuck now,how to find the longest side a

Ohm's law
Answered

kulisamilhh
2022-04-25

Resistivity
Answered

Waylon Mcbride
2022-04-12

${x}^{\u2033}=g-k{v}^{4}\phantom{\rule{0ex}{0ex}}\phantom{\rule{thickmathspace}{0ex}}\u27f9\phantom{\rule{thickmathspace}{0ex}}\phantom{\rule{1em}{0ex}}v\frac{dv}{dx}=g-k{v}^{4}$

Solving this I get

$\frac{1}{4\sqrt{gk}}\mathrm{log}{\textstyle (}\frac{\sqrt{k}{v}^{2}-\sqrt{g}}{\sqrt{k}{v}^{2}+\sqrt{g}}{\textstyle )}=x+c$

It is falling from rest, i.e x=0,v=0, using this initial condition I get $\mathrm{log}(-1)$ on the LHS. Is something wrong with the solution. I check that integral is correct.

Resistivity
Answered

Jaime Coleman
2022-04-12

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.

Ohm's law
Answered

llunallenaipg5r
2022-04-12

Ohm's law
Answered

Brooklynn Hubbard
2022-04-12

Ohm's law
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Jordon Haley
2022-04-07

Ohm's law
Answered

Justine Webster
2022-04-07

Ohm's law
Answered

zuzogiecwu
2022-04-07

Path of Least Resistance
Answered

lasquiyas5loaa
2022-04-06

Resistivity
Answered

Alisa Durham
2022-04-06

The submarine increases its speed from ${v}_{1}$ to ${v}_{2}$, show that the distance travelled in this period is $\frac{m}{2k}\mathrm{ln}\frac{F-k{v}_{1}^{2}}{F-k{v}_{2}^{2}}$ where k is a constant.

I've found $\frac{dv}{dt}=\frac{1}{m}(F-k{v}^{2})$ using $\sum F=ma$ but I am struggling to progress further using integration or the fact that $\frac{dv}{dt}=v\frac{dv}{dx}=\frac{d}{dx}(\frac{1}{2}{v}^{2})=\frac{{d}^{2}x}{d{t}^{2}}$ which is how I've been taught to solve resisted motion questions.

Secondary
Answered

jubateee
2022-01-03

A capacitor is charged to a potential of 12.0 V and is then connected to a voltmeter having an internal resistance of $3.40M\mathrm{\Omega}$. After a time of 4.00 s the voltmeter reads 3.0 V.

What are (a) the capacitance and (b) the time constant of the circuit?

Secondary
Answered

PEEWSRIGWETRYqx
2021-12-16

A hollow, conducting sphere with an outer radius of 0.250 m and an inner radius of 0.200 m has a uniform surface charge destiny of $+6.37\times {10}^{-6}\frac{C}{{m}^{2}}$. A charge of $-0.500\mu C$ is now introduced at the center of the cavity inside the sphere.

(a) What is the new carge density on the outside of the sphere?

(b) Calculate the strength of the electric field just outside the sphere.

(c) What is the electric flux through a spherical surface just inside the inner surface of the sphere?

Secondary
Answered

Baublysiz
2021-11-21

An oil pump is drawing 44 kW of electric power while pumping oil with ρ= 860 kg/m^3 at a rate of 0.1 m^3/s. The inlet and outlet diameters of the piper are 8 cm and 12 cm, respectively. If the pressure rise of oil in the pump is measured to be 500 kPa and the motor efficiency is 90 percent, determine the mechanical efficiency of the pump.

Secondary
Answered

jazzcutie0h
2021-11-20

A water pump that consumes 2 kW of electric power when operating is claimed to take in water from a lake and pump it to a pool whose free surface is 30 m above the free surface of the lake at a rate of 50 L/s. Determine if this claim is reasonable.

Secondary
Answered

verskalksv
2021-11-07

A well-insulated rigid tank contains 3 kg of saturated liquid-vapor mixture of water at 200 kPa. Initially, three-quarters of the mass is in the liquid phase. An electric resistance heater placed in the tank is now turned on and kept on until all the liquid in the tank is vaporized. Determine the entropy change of the steam during this process. Answer: 11.1 kJ/K

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!