Physics, 31.03.2020 00:54 ovengel12

A 3.0 m long straight horizontal wire carrying a current of 4.7 A along the +x-direction is in a region of uniform magnetic field, B. If the mass of this wire is 0.4 kg, find the magnitude and direction of the magnetic field necessary to have this wire "float" in the Earth's gravitational field. (Assume the force due

Answers: 1

Show answers

Answers

Answer from: treypickich14

B=18.15T

Explanation:

The force due to the magnetic field must equal the gravitational force

Fm=Fg

We assume that the direction of the magnetic field is perpendicular to the current in the wire. By using the expression for the magnetic force in a wire, we have

$F=iLBsin\theta=iLB$

where L is the length of the wire, and i is the current.

For the gravitational force we have:

$F=Mg=(0.4kg)(9.8\frac{m}{s^2})=3.92N$

Hence, by doing Fm=Fg

$F_{m}=F_{g}\\\\iLB=256N\\\\B=\frac{256N}{(4.7A)(3.00m)}=18.15T$

Hope this helps!!

Answer from: mandilynn22

B = 0.2780 T

The direction is along positive + z-direction

Explanation:

Given that :

A 3.0 m long straight horizontal wire carrying a current of 4.7 A

i.e L = 3.0 m

I = 4.7 A

Which is along x - axis direction in a uniform magnetic (B) field

mass of the wire = 0.4 kg

So;

F_B = F_g

B *I*L(sin 90) = mg

$B = \frac{mg}{I*L*(sin90)}$

$B = \frac{0.4*9.8}{4.7*3.0}$

$B = \frac{3.92}{14.10}$

B = 0.2780 T

And:

The direction is along positive + z-direction

Answer from: Quest

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me

Answer from: Quest

Perhaps seek some professional ? it isn't very asking some children who are just trying to find out answers to homework.also, it seems professional would actually be good to you. obviously it isn't going to magically fix your depression, but it'll do something. drugs, smoking weed, it won't do much, especially if your husband is against it. if you do it he'll dislike it. but talk to him, try and get him to listen to you, and figure everything out together, okay? there's a website- maybe it can offer some ?

Another question on Physics

Physics, 22.06.2019 07:50

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.

Answers: 2

Answer

Physics, 22.06.2019 12:30

If you place a magnet under a clear dish, and sprinkle iron fillings over it, above what part of the magnet will most of the fillings gather

Answers: 2

Answer

Physics, 22.06.2019 14:10

In one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.

Answers: 2

Answer

Physics, 22.06.2019 17:50

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?

Answers: 1

Answer

You know the right answer?

A 3.0 m long straight horizontal wire carrying a current of 4.7 A along the +x-direction is in a reg...

Questions