Physics, 17.10.2019 23:30 okok111

Two long, charged, thin-walled, concentric cylindrical shells have radii of 4.3 and 7.0 cm. the charge per unit length is 4.8 × 10^-6 c/m on the inner shell and -6.4 × 10^-6 c/m on the outer shell. what are the (a) magnitude e and (b) direction (radially inward or outward) of the electric field at radial distance r = 6.1 cm? what are (c) e and (d) the direction at r = 12 cm?

Answers: 2

Show answers

Answers

Answer from: siyah87

(a). The electric field at r = 6.1 cm is $1.4\times10^{6}\ N/C$ .

(b). The direction of electric field is outward.

(c). The electric field at r = 12 cm is $2.3\times10^{5}\ N/C$ .

(d). The direction of electric field is inward.

Explanation:

Given that,

Radius of small shell = 4.3 cm

Radius of large shell = 7.0 cm

Charge per unit length inner shell $\lambda= 4.8\times10^{-6}\ C/m$

Charge per unit length outer shell $\lambda= -6.4\times10^{-6}\ C/m$

(a). We need to calculate the electric field at r = 6.1 cm

$r_{i}$

Using formula of electric field

$E(r)=\dfrac{\lambda_{i}}{2\pi\epsilon_{0}r}$

Put the value into the formula

$E_{r}=\dfrac{4.8\times10^{-6}}{2\pi\times8.85\times10^{-12}\times6.1\times10^{-2}}$

$E_{r}=1.4\times10^{6}\ N/C$

(b). We need to calculate the direction of the electric field

The direction of electric field is outward.

(c). Since, $rr_{o}$

We need to calculate the electric field at r = 12 cm

Using formula of electric field

$E(r)=\dfrac{\lambda_{i}+\lambda_{o}}{2\pi\epsilon_{0}r}$

$E_{r}=\dfrac{4.8\times10^{-6}-6.4\times10^{-6}}{2\pi\times8.85\times10^{-12}\times12\times10^{-2}}$

$E_{r}=−2.3\times10^{5}\ N/C$

Negative sign shows the direction of electric field is inward.

(d). We need to calculate the direction of the electric field

The direction of electric field is inward.

Hence, This is the required solution.

Answer from: Quest

The air we breath is made of mostly oxygen molecules

Answer from: Quest

quantum mechanics or quantum physics is physics of very small objects (particles) and physical entities.

quantum physics has some parallels to our macro world and some pretty unique ideas which theoretically and mathematically proven to be true even though we will never be able to access them because of our size.

there are many types of particles: subatomic, elementary etc.

subatomic means they are smaller than atom, elementary means they are at the very basis of everything.

subatomic particles are for eg. protons, neutrons but not electrons.

elementary particles are categorised into 3 groups by what they do.

these 3 groups are quarks, leptons and bosons.

light for example is a particle more precisely a photon a part of leptons.

proton (subatomic particle) is made out of 2 up quarks and 1 down quark each of these has a fractional charge like $\frac{1}{3}$ . (i crazy)

most famous scientist who contributed to this physics are:

max planckalbert einsteinerwin schrödingermany

the topic itself us understand a lot and will probably be vastly used in the future (quantum computers, understanding the big bang,

we also must not forget quantum effects like:

superposition (where 1 thing can be this and that at the same time),entanglement (where two particles are seemingly connected by some sort of unknown (or known) force, energy, matter (i know all that can be the same at least it was at the beginning)

and there is more. but probably too much for this answer to be consistent due to my average understanding of this topic.

hope this you understand quantum mechanics a little more. i'm not an expert in the topic (so don't be like wth if you are an expert) but i'm very interested in it.

anyways quantum physics is a very hard topic (harder than physics (perhaps)) therefore searching for every information there is about it and learning it is unfortunately impossible (you can only specialise into 1 - 3 things or more (perhaps

have fun and i wish you luck!

r3t40

Another question on Physics

Physics, 21.06.2019 23:40

Aregular polygon has angkes of size 150° each.how many side has the polygon

Answers: 1

Answer

Physics, 22.06.2019 08:30

What properties of a moving object are used in determining the object's energy of motion

Answers: 2

Answer

Physics, 22.06.2019 18:30

Both speed and velocity measure how fast something is moving. however, since speed is not a it does not require a(n question 6 options: a) quantity , unit b) magnitude, unit c) scalar, direction d) vector, direction

Answers: 2

Answer

Physics, 22.06.2019 19:30

What you see with your eyes is a form of energy. a. light b. heat c. chemical d. electrical

Answers: 2

Answer

You know the right answer?

Two long, charged, thin-walled, concentric cylindrical shells have radii of 4.3 and 7.0 cm. the char...

Questions