Magnetic force Definition and 398 Threads

Homework Statement The current in a straight wire is traveling from left to right (in the plane of a page). Right above the wire is a electron which is moving parallel to the wire and also left to right The question is which direction is the magnetic force above the wire pointing. Possible...

QUESTION 1 Homework Statement Determine the magnetic force acting on an proton (m = 1.67 x 10-27 kg) moving at 2.9 x 106 m/s in a magnetic field of 6.8 T. The proton is moving south. The magnetic field points straight down. Homework Equations F = qvBsinø The Attempt at a Solution...

Homework Statement It is a multiple choice question. The picture shows two bar magnet attracting each other. A charge is placed in the middle of the distance between the two magnets. [S-Magnet-N] >>>> (-C) >>>> [S-Magnet-N] >>> = direction of field lines. (-C) =negative There is no...

Ok, just a quick question. I'm working through a problem in my physics book and I am asked to find the magnetic force on a current carrying wire that runs along the equator of a sphere. So the wire is not straight, but curves along with the sphere, off the surface of it (not levitating). My...

Magnetic forces are no-work forces.But when a magnet suspended freely in the Earth's magnetic field(from its center of gravity) rotates to settle itself in an approximately north south direction ,performing some work in the process. Who does this work?Obviously the magnetic forces which are...

Is there a formula for the force between two parallel wires of non-equal length? Would one just use the length of the shorter of the two wires?

Homework Statement Placed in a cylindrical container of negligible mass, a magnet with weight W is placed on a analytical balance. Another magnet is placed on top of it, hanging in mid-air and is stationary. What is the reading of the analytical balance? Homework Equations The...

Hi The magnetic force applied to electron spin magnetic moment is interpreted by Lorentz force qvXB ? I do not think so. If not, we easily understand why magnetic force can work. Regards.

Hi all, I ran into a bit of an issue trying to figure out how to properly differentiate the magnetic force due to particle interactions. To be specific, I'm actually looking for the time derivative of acceleration (jerk) due to the magnetic force, but it's essentially the same problem. For...

Why? Is there an explanation to that? I know that it's because the magnetic force is perpendicular and so on, but then why the magnetic force works that way? Thank you

Homework Statement Question is E=(x,y,z) B=(x,y,z) v=(x,y,z) (in vector form) For all E,B,v find v(t) and r(t) v and r of course have their vector arrows. Homework Equations F=ma= qE + qv x B There is a hint to take second derivatives across and some terms will clear up. I was thinking more...

I am having a problem with my understanding. I could be incorrect, but I think that the magnetic field emitted from a magnet is consistent and doesn't weaken at points further away. Then could someone explain how magnet force weakens with distance. I would also like to know the math so here is a...

Homework Statement A rectangular loop with length of l = 0.30 m and width w = 0.12 m and a mass of 25-grams falls (from rest) a distance of .28 m before entering a constant magnetic field that points out of the page. The internal resistance of the wire is 5.5 \Omega. (i) What is the speed of...

Homework Statement A positively charged particle moves through a region with a uniform electric field pointing into the page and a uniform magnetic field pointing toward the top of the page. The particle can have one of the four velocities shown in the figure ...

Homework Statement A square 5-turn coil with sides .03 m long and carrying 2 A of current is placed in a uniform magnetic field of .07 T, as shown. What is the magnitude and direction of the force on each of the four sides? What is the magnitude and direction of the torque \tau on the...

I know I am not doing collage or uni stuff but this is more advance stuff that that by a little bit. Does anyone know an equation for the force between 2 magnets. the only one we get is for a magnet and a wire f=ILBsinΘ. This is to help me with an investigation with an electro magnet and...

this is a very low level question: I want to calculate the force that it is between two magnetic field . PLZ give me a formula of it for B1 & B2.

Homework Statement Decide from the following list of possibilities what is the appropriate direction of the force on the wire for each of the diagrams 1 through 4: A up B down C left D right E into the page F out of the page G None of these H No force Diagram 1 Diagram 2...

How to obtain the magnetic force?? Hi , I didn't have any experience to design coil and permenent magnet . Now i have to do one project using coil and magnet NdFeB. But i haven't got the maximum force. (need maxi force between 1300 to 2500) I am doing the below procedure. Is it...

an electron m=9.11x10^-31 kg and q= -1.602x10^-19 C enters a region where th magnetic field is constant and perpendicular to the velocity of the electron. the speed of the electron is v=5x10&m/s. the electron moves in a circle of radius 2cm. a. what is the magnitude B of the magnetic field...

1. Homework Statement : A wire with a length of 29.0 cm lies along the z-axis and carries a current of 9.00 A in the +z-direction. The magnetic field is uniform and has components Bx = -0.204T, By = -0.968T, and Bz = -0.328 T Homework Equations 1. Find the x-component of the magnetic...

Homework Statement An electron that has a velocity with x component 1.7 x 106 m/s and y component 3.9 x 106 m/s moves through a uniform magnetic field with x component 0.029 T and y component -0.15 T. (a) Find the magnitude of the magnetic force on the electron. (b) Repeat your calculation...

When i am shown pictures of bar magnets they show magnetic field lines with arrows diverging out the north pole, and converging back into the south pole 1. Does the magnetic field coming out the north pole, turn back and wind back into the south pole ? 2. what is actually carried along the...

Homework Statement A long pair of wires conducts 20.2 (amps) od dc current to, and from, an instrument. The wires are 23mm apart, what is the magnetic field 9.7cm from their midpoint in their plane? Homework Equations B=(µo/2pi)*(I/d) The Attempt at a Solution µo = 4pix10^-7...

I searched different places but couldn't find how actually you calculate this:- What is the magnitude of force experienced by a cylindrical piece of iron placed near the end of a solenoid with internal field strength B0.

Figure below shows a length of wire with a central arc, placed in a uniform magnetic field B that points out of the plane of the figure. If the wire carries a current i, what resultant magnetic force F acts on it? Express the answer in terms of B, L, R and i. I am stuck in this question for...

Homework Statement What is the magnetic force on a wire 0.25 m long, carrying a current of 4.0 A, when placed in a uniform magnetic field of 0.50 T, at an angle of 45 to the wire? Homework Equations The Attempt at a Solution this question doesn't make sense to me it said"when...

Homework Statement A singly charged positive ion has a mass of 2.51 X 10-26 kg. After being accelerated through a potential difference of 264 V, the ion enters a magnetic field of 0.570 T, in a direction perpendicular to the field. Calculate the radius of the path of the ion in the field...

Homework Statement Sodium ions (Na+) move at 0.844 m/s through a bloodstream in the arm of a person standing near a large magnet. The magnetic field has a strength of 0.259 T and makes an angle of 59.0° with the motion of the sodium ions. The arm contains 95.0 cm^3 of blood with a...

Homework Statement Each current depicted below by an “x” flows into the screen. At which of the following points (A, B, C, or D) is the magnetic force on a charge the largest? A_______B_x___C__D_x______ ------------1---------2 Note that C is equidistant from both wires...

Someone on YoutTube stated... Each magnetic pole drops off by 1/R^2. Once you get away from both poles (Cavendish setup) they they start canceling each other out and it ends up as 1/R^3. Comments? Here's the link if you need backup info...

Homework Statement A metal ball having net charge 4.5 × 10−6 C is thrown out of a window horizontally at a speed 43 m/s. The window is at a height 63 m above the ground. A uniform horizon- tal magnetic field of magnitude 0.071 T is perpendicular to the plane of the ball’s tra- jectory...

Homework Statement A rigid wire carrying a current I, consists of a semicircle of radius R and two straight portions of length L. The wire lies in in a plane perpendicular to a uniform magnetic field B. The straight portions are also within the magnetic field. Determine the net force due to B...

I'm sorry to post two questions in succession, this is another one on the same topic (I'm obviously having trouble with this whole concept for some reason...) Homework Statement Three long parallel wires are 3.8 cm from one another. (Looking along them, they are at three corners of an...

Hi all I tried to solve one of the magnetostatic problems and I end up with a trivial solution. The problem as shown in the figure, we have an infinite current carrying line and a circle with a radius "b" and current I2. The problem asks for the force being exerted by the line on the...

Homework Statement If the magnetic field of the wire is 2.5×10^−4 and the electron moves at 1.0×10^7 , what is the magnitude of the force exerted on the electron? Homework Equations F=qvBsin(theta) The Attempt at a Solution Sin(theta) = sin90 = 1 q = -1 v = 1e7 B = 2.5e-4 So...

Homework Statement A proton with an initial velocity of magnitude v in the +x direction enters a uniform magnetic field. For which direction or directions of the magnetic field, if any, will there be zero magnetic force on the proton? + x - x + y - y + z - z Homework Equations There...

Homework Statement A particle with a charge of 35.7 uC moves with a speed of 61.1 m/s in the positive x direction. The magnetic field in this region of space has a component of 0.527 T in the positive y direction, and a component of 0.820 T in the positive z direction. What is the magnitude...

Homework Statement A high-voltage power line carries a current of 106 A at a location where the Earth's magnetic field has a magnitude of 57.1 µT and points north, 71.9° below the horizontal. Calculate the magnitude of the magnetic force exerted on a 251 m length of wire if the current in...

Homework Statement A wire is oriented along the x-axis. It is connected to two batteries, and a conventional current of 2.3 A runs through the wire, in the +x direction. Along 0.27 m of the length of the wire there is a magnetic field of 0.82 tesla in the +y direction, due to a large magnet...

To all the experts: Ok, in this example, I'm going to have an "ideal" circuit with no ohmic losses, etc. just for ease of calculation... The circuit is connected to a power source with it's own on/off switch. I turn on the power source and... 1. How fast does the Electric Force...

Homework Statement The top wire is 1.00 mm diameter copper wire and is suspended in air due to the two magnetic forces from the bottom two wires. The current flow through the two bottom wires is 95 A in each. Calculate the required current flow in the suspended wire. Homework...

Homework Statement A long, straight wire carries a current of I1 = 15.8 A. Next to the wire is a square loop with sides L = 1.17 m in length. d = 1.42 m, as shown in the figure below. The loop carries a current of I2 = 2.66 A in a direction parallel to the wire. Calculate the magnitude of...

Is there a way of calculating how much force can be applied to an object if you are given the magnetic field strength of an electromagnetic? For example, if an electromagnet produces a B field of 4T, what is the maximum mass of iron it can hold? And also, how does one calculate the...

Homework Statement An electron travels at a speed of 2.0x10^4 m/s through a uniform magnetic field whose magnitude is 1.2x10^-3 T. What is the magnitude of the magnetic force on an electron if its velocity and magnetic field: a. are perpendicular? b. make an angle of 45 degrees? c. are...

Hi, I'm buying magnets for a required experiment in my magnetic and electricity physics class. The supplier gives to important pieces of information: BrMax: 3850 gauss and Pull Force: 33lbs. I was wondering if there is a relatively simple formula so that I can calculate the force of the magnet...

how much magnetic force would it take to launch 1,000 , 5,000 and 10,000 pounds into orbit? of say 270 miles up, using an electromagnet. also how much energy would be required to produce this force and lastly how much energy can be gotten from a dam(hydroelectric power plant) and how much...

A proton high above the equator approaches the Earth moving straight downward with a speed of 355 m/s. Find the acceleration of the proton, given that the magnetic field at its altitude is 4.05 X 10^-5 T. Homework Equations F = MA =eVBsin? a = evB/m The Attempt at a Solution...

Homework Statement A packed bundle of 100 long, straight, insulated wires forms a cylinder of radius R = 0.500 cm. (a) If each wire carries 2.00 A, what are the magnitude and direction of the magnetic force per unit length acting on a wire located 0.200 cm from the center of the bundle?Homework...

Homework Statement The bent wire shown in the figure below lies in a uniform magnetic field. Each straight section is 2.0 m long and makes an angle of θ = 65° with the x axis, and the wire carries a current of 2.0 A. (a) What is the net magnetic force on the wire in unit-vector notation if...