Physics, 05.10.2019 12:00 cherylmorton7302

How much energy is stored in the electric field of a 50-μm-diameter cell with a 7.0-nm-thick cell wall whose dielectric constant is 9.0?

Answers: 1

Show answers

Answers

Answer from: haileysolis5

The capacitance of the capacitor will be $\boxed{8.9\times10^{-11}\text{ F}}$ or $\boxed{89\text{ pF}}$ .

Explanation:

Given:

The diameter of the plates of the capacitor is $50\,\mu\text{m}$ .

The distance between the plates is $7\text{ nm}$ .

The dielectric constant of the medium is 9.0 .

Concept:

The two conducting plates kept parallel to each other and placed at a particular distance from one another are considered to be the parallel plate capacitor.

The capacitance of the parallel plates capacitor formed by the two plates is given by the expression:

$\boxed{C=\dfrac{K\epsilon_0A}{d}}$

Here, is the capacitance of the plates, is the dielectric constant of the medium, $\epsilon_0$ is the permittivity of free space, is the area of the plates and is the distance between the plates.

The area of the plates is:

$\begin{aligned}A&=\pi R^2\\&=3.14\times(25\times10^{-6})^2\\&=1.96\times10^{-9}\text{ m}^2\end{aligned}$

Substitute the values in equation of capacitance.

$\begin{aligned}C&=\dfrac{9.0\times8.85\times10^{-12}\times1.96\times10^{-9}}{7.0\times10^{-9}}\\&=8.9\times10^{-11}\text{ F}\\&=89\text{ pF}\end{aligned}$

Thus, The capacitance of the capacitor will be $\boxed{8.9\times10^{-11}\text{ F}}$ or $\boxed{89\text{ pF}}$ .

Learn More:

1. Change in momentum due to its collision:

2. Type of mirror used by dentist:

3. Energy density of the energy stored between the plates of capacitor

Answer Details:

Grade: Senior School

Subject: Physics

Chapter: Capacitor

Keywords:

capacitor, capacitance, electric, parallel, plates, particular distance, dielectric constant, permittivity, area of the plates.

Answer from: Quest

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19

Answer from: Quest

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

Another question on Physics

Physics, 21.06.2019 18:30

If a textbook weighs 37.2 n on venus, and the book has a mass of 4.4 kg, what is the strength of gravity on venus? 8.9 m/s28.9 m/si don't have enough information,9.8 m/s2

Answers: 1

Answer

Physics, 22.06.2019 03:50

The intensity of a polarized electromagnetic wave is 12 w/m^2. part a) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=0∘ with the plane of polarization? part b) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=30∘ with the plane of polarization? part c) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=45∘ with the plane of polarization? part d) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=60∘ with the plane of polarization? part e) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=90∘ with the plane of polarization?

Answers: 1

Answer

Physics, 22.06.2019 10:00

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

Answers: 2

Answer

Physics, 22.06.2019 17:50

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system

Answers: 2

Answer

You know the right answer?

How much energy is stored in the electric field of a 50-μm-diameter cell with a 7.0-nm-thick cell wa...

Questions