Magnetic field strength Definition and 102 Threads

Homework Statement the power density of sunlight, at the earth, is roughly 1 kilowatt/meter^2. How large is the rms magnetic field strength?Homework Equations The Attempt at a Solution I tried using the equation for power density S = E(rms)^2=√(εμ), then substituting B(rms)/c for E(rms), and...

1. Homework Statement At what distance (in m) from a very thin, straight wire carrying a 38 A current would the magnetic field strength be the same as a refrigerator magnet of 4.35 x 10-3 T? 2. Homework Equations B=(μo/2pi)*(I/d) where μo=4pi*10^-7 3. The Attempt at a Solution...

http://s3.amazonaws.com/answer-board-image/2924bffb-da01-4543-9697-b67da02e5a5a.jpeg The picture above shows four square regions. Each of the four regions may have its own uniform magnetic field. If there is a uniform magnetic field in a region, the field is directed either into or out of the...

Hello, Suppose there are two conductors carrying currents. One of them is bare conductor and the other has insulation. Now magnetic field will be created around them due to the current flow through them. What will be the condition of magnetic field strength around them? They have same field...

I'm looking at redesigning a hydraulic solenoid valve with the aim of reducing the package size. The solenoid coil is by far the largest component of the device, with about 4000 coils arrayed in about 90 layers stacked on top of each other. I'm wondering if I can reduce the size by removing some...

I had a lab to do for Physics, and we used a variable voltage source and an electromagnet with 60 turns of copper wire. What is the equation to use to find the magnetic field strength B using relative permeability of a soft iron core? i cannot find this equation anywhere... plus, what is the...

I am trying to find an equation that tells the strength of a magnetic field a given distance away from the source. It would be very helpful if all terms are defined, since the internet is notorious for not saying what variables mean. Gracias

Homework Statement A 14.2 cm - diameter circular loop of wire is placed with the plane of the loop parallel to the uniform magnetic field between the pole pieces of a large magnet. When 3.10 A flows in the coil, the torque on it is 0.135 m N. What is the magnetic field strength? 2...

OK well, this isn't a question as such, more a conceptual thing... The formula, B=(Weber)/(Area) gives the magnetic field strength, B in Tesla... . But when I rearrange in terms of magnetic flux, it's obviously (Tesla) X (Area). My question is, how is the flux (lines of force) defined by the...

Homework Statement Here are a bunch of questions that I've attempted. I feel fairly confident with my answers, but I just wanted to make sure :) Thanks! a) calculate the synchronous speed, amount of slip and the percentage slip in a typical aircraft a.c., four pole, 400hz induction motor...

I have to desgin an experiment for physics and and my research question is going to be: How does the cross-sectional area of the solenoid’s coil affect the strength of its magnetic field? This is my hypothesis, my question is if you think the reasoning is valid. I believe I should find it is...

Homework Statement A wire in the shape of semicircle with radius a is oriented in the yz-plane with its center of curvature at the origin (Fig. 28.67). If the current in the wire is I, calculate the magnetic-field components produced at point P, a distance x out along the x-axis. (Note: Do not...

Homework Statement Homework Equations The Attempt at a Solution I let µ be 9, as that's the approximate permittivity of air/ free space. I assumed that as a hat had a subscript y, it ran parallel to the y axis, and worked from there, getting the cross product of the unit...

Homework Statement So I have done a lab involving how Magnetic Field Strength varies with distance from a magnet. using a magnetic field sensor, some recording software, a meter stick a magnet. From this I gathered the fact that as distance increases magnetic field strength decreases...

Homework Statement An electron in a cathode-ray tube is accelerated through a potential difference of 10kV, then passes through the 2.0cm wide region of uniform magnetic field.What field strength will deflect the electron by 10 degrees? Homework Equations Ki + Ui = Kf + Uf K =...

I have read a number of journal article that state that magnetic field strength diminishes inversely proportional to the square of the distance. BUT more than one has stated that the field strength is inversely proportional to the cube of the distance from the surface of the magnet. Which one...

okay guys, i think I am out of my depth on this problem. Im doing a long investigation on eddy currents, and i derived a formula. I am reaching the end of the investigation, and so i wanted to compare my experimental data to expected data. One of the factors i was investigating is the...

I have to spec a sensor to monitor the magnetic field of a DC solenoid element. The specification for the solenoid includes its length, DC resistance, current at the applied supply voltage, and most importantly, the expected Dipole Moment of the unit, as 42 Am^2. I plan to attach a solid...

Homework Statement Homework Equations State Amperes Law. Show that the magnetic field at a distance R from a very long straight wire carrying a current I has magnitude μ I / (2 pi R) The Attempt at a Solution I really don't know :(

Homework Statement A current I flows to the right on the x-axis from the origin to x = infinity. What's the magnitude of the magnetic field at (x,y) = (0,L)? Homework Equations B = u sub 0 time I/(2 pi R) The Attempt at a Solution We use above equation since we have an extremely...

Homework Statement Hi, I am trying to calculate the current and magnetic field strength needed to pick up a 0.3125 lb. piece of a channel lock plier made of ferritic stainless steel (they have a soft magnetic component) on its y-axis (on the lighter part of the piece) at an 80 degree angle...

1. As mentioned in the title,we were asked to investigate a factor that affects the magnetic strength of a solenoid. Independant variable is current.I used a solenoid , put it on a stand vertically,above of a magnet placed on a digitall weighing machine.I set the solenoid,a device to measure...

Homework Statement Estimate the strength of the magnetic field for which Zeeman splitting of the 3p energy levels in sodium equals the energy due to spin-orbit coupling Homework Equations The Attempt at a Solution I know the equations for spin orbit and the zeeman effect, and I...

please help?? 1. Homework Statement I got 1/2 of this problem right, but I am not sure of the other part. I have attached the picture. The questions are as follows (with the answers that I am sure of) -- What is the magnetic field strength at point 1 in the figure? What is the magnetic...

Homework Statement I got 1/2 of this problem right, but I am not sure of the other part. I have attached the picture. The questions are as follows (with the answers that I am sure of) -- What is the magnetic field strength at point 1 in the figure? What is the magnetic field direction at...

Homework Statement You have 10 m of 0.55 mm diameter copper wire and a battery capable of passing 13 A through the wire. What magnetic field strength could you obtain inside a 2.8 cm diameter solenoid wound with the wire as closely spaced as possible? Homework Equations Turns of a...

Homework Statement Magnet A has twice the magnetic field strength of magnet B and at a certain distance pulls on magnet B with a force of 55 N. With how much force, then, does magnet B pull on magnet A? Homework Equations unknown The Attempt at a Solution unknown

wire 1 has a current of 1A directed into the page, wire 2 is 20 cm to the right of wire 1 with a current of 1A, what direction does this current have to flow in order for the magnetic field strength at the mid point between them to be non zero ? from the right hand rule the mag field from...

Gravitational force is divided by distance squared. What is the equivalent divisor for a fixed bar magnet? Thank you for your kind attention :-) (-_-)

Homework Statement What is the magnetic field strength on Earth's surface at either pole? Earth's magnetic dipole moment is D_0 What is the magnetic field strength on Earth's surface at either pole? B = ____ G Homework Equations _u = NIA ; N is the number of turns I is current, A...

I have a component made of some sort of stamped steel which has a significant magnetic field (upto 2000mGa) which I need to use near a sensitive magnetic sensor. The field is high enough to saturate the sensor so I can't calibrate it out. Does anyone have any idea about degaussing? I tried...

Homework Statement This is part of a lab I did, I am working on the writeup now. We placed a coil of wire inside of a Helmholtz pair, with 20V of 60Hz AC through the Helmholtz pair. The coil inside was connected to an oscilloscope and the induced voltages were recorded. I now need to...

Homework Statement Two straight parallel wires are placed vertically on a wall. The distance between the wires is 12 cm and the current through each one is 7.5A. In the left wire the current is directed upwards and in the right one the current points downwards. Determine the magnetic field...

Hey guys, I trying to work out this formula for work. We have a magnetic solenoid that is suspended a certain distance from a sensor tool. This sensor has 3 magnetometers that measure the field strength in Bx,By,Bz directions. The magnetic solenoid is run with a constant current of 0.75A. We...

Does Earth's magnetic field strength increase with depth?

this is just a question i can't seem to find an answer for, but i was wondering how strong a 5 tesla magnetic field is?

[SOLVED] [101] Magnetic field strength in fN Homework Statement You have arranged that the magnetic field in a particular region of space is due North with a value of 0.01 T. An electron enters the field traveling to the West with a speed of 0.05 of the speed of light. As a result, the...

Homework Statement A heavy conductor (mass m, length l, resistance R) is suspended by two springs each with spring constant k, and connected to a battery with electric potential V as shown in the figure. A magnetic field B is now imposed. The acceleration of gravity is 9.8 m/s^2. I'm going to...

Homework Statement A 10-cm-diameter parallel-plate capacitor has a 1.0 mm spacing. The electric field between the plates is increasing at the rate 1*10^6V/m/s. What is the magnetic field strength 3.0 cm from the axis? Homework Equations B= uo/(2*pi) *r/R^2*(Chang in Q/ change in...

Homework Statement What are the magnetic field strength and direction at the dot in Figure Ex32.8, in which v = 3.0*10^7 m/s? Figure Ex.32.8 is attached to the this post. r = 0.02828 m m0/4pi = 10^-7 T v = 3.0*10^7 m/s q = 1.60217653*10^-19 C Homework Equations Biot-Savart Law...

Homework Statement A magnetron is a microwave source in which a "bunch" of electrons travel on a circular orbit in a uniform magnetic field. As the electrons pass the electrodes, a high-frequency alternating voltage difference occurs. Suppose the resonant frequency is f = 2.82×10^10 s-1...

why does magnetic field strength decrease much faster than the inverse square of the distance like gravity? Is it because the force lines have to curve back to the source? Is magnetism also carried by an "imaginary" particle? Thanks. Mr Beh

1) Methods/equipment for radioactivity detection. For my high-school Chemistry studies, needs clarification. Geiger counter: A small chamber contains a high voltage electric field inside filled with inert gas. When ionizing particles/radiation enters the chamber, it will ionise the...

Homework Statement The figure shows a vertically polarized radio wave of frequency 1.0 times 10^6 traveling into the page. The maximum electric field strength is 1000V/m. What is the maximum magnetic field strength? What is the magnetic field strength at a point where E=500V/m down What is...

Homework Statement Two very long parallel wires which are 20cm apart ,carry currents of 1.5A and 2.0A respectively, flowing in opposite directions. Calculate the magnetic field strength at following points in plane of two wires (i) midway between wires (ii)at a point 10cm from the wire...

Homework Statement Hi after doing a experiment at school, I have come up with a graph of magnetic field strength against current. I was wondering if anyone knew what the gradent of this line or area under the line represented? Homework Equations B=KI/R? The Attempt at a Solution...

Homework Statement Hi there.this is one of those proof dealies that i think i nearly have right but i was wondering if anyone could point out if i have made too many assumptions or anything thanks. Show that if a bar magnet is suspended in a uniform magnetic field, of strength H, and is...

Another poster is looking for a 20T magnetic field or better, so I went looking for what has been reported as the maximum field strength for an SC magnetic field to date. However I found some contradicting claims. Is there a refereeing organization or a reputable source from which to...

The maximum theoretical field strength for a neutron star, and therefore for any known phenomenon is 1013 T. Why is there a maximum?

I have racked my brain for the past two hours and I can't figure this out. If anyone can help me with, please do. Two long parallel wires 6.00 cm apart carry 19.5 A currents in the same direction. Determine the magnetic field strength at a point 12.0 cm from one wire and 13.4 cm from the...