Magnetic flux Definition and 367 Threads

This question might seem rather naive. We define the magentic flux through a loop by \Phi = \int \vec B \cdot d\vec a. But an infinite number of different surfaces can be fitted to a given boundary line...so how is the flux independent of the nature of the surface used?

These Q's are probably simple for those of you who have/completed a course in Vector Calculus. But I'm only a higschool/secondaryschool student, so I haven't. 1. I'm not sure how the infinitisemal magnetic flux density d\textbf{B} from a wire element d\textbf{l} with a current I, which is...

Hey everyone, I have failed to show that the magnetic flux outside a cylindrical conductor is zero. The problem goes like this: a coaxial cable consists of a solid inner cylindrical conductor of radius a and an outer cylindrical conductor of inner and outer radius b and c. Distributed...

I am really really hoping that the answer is wrong in the back of my book otherwise my entire basis for electricity/magnetism will be shattered :cry: Basically, there is a picture of a magnetic field going into the page, and there is a coiled loop within this magnetic field. If the...

Hello Group Members :smile: I was needing some candid explanation or guidance on what are similarities and differences between magnetic flux and electric flux. One thing I know of is that magnetic flux acts on ferromagnetic material whereas Electric flux acts on any oppositely charged...

After everyone in our class got less than 50% on our first physics test this term, (AC, magnetic flux, frequency/oscillations), our teacher decided to give us a retest. Though, he hasn't gone over anything else, so i thought i'd ask a couple questions here. 1. I was taught that Inductive...

I'm planning an investigation on how magnetic flux density midway between opposite poles of 2 bar magnets varies with separation of the bar magnets (using a Hall Probe). [simply as shown in attachment] To do this, I'll need to calibrate a hall probe (which I think is done by working out the...

Here is the problem A long and narrow rectangular loop of wire is moving toward the bottom of the page with a speed of 0.020m/s (see the drawing). The loop is leaving a region in which a 2.4-T magnetic field exists; the magnetic field outside this region is zero. During a time of 2.0s, what...

Hi, I have a question as follows. For an infinite solenoid with magnetic flux \Phi, for what values of \Phi "is the quantum mechanical motion of an electron constrained to stray far from the solenoid exactly the same as it would be if \Phi were zero"? Solution: \Phi = n \Phi_{o} with n =...

Find the magnetic flux crossing the portion of the plane theta = x/4 defined by 0.01 m < r <0.05 m and 0 m < z < 2 m. A current of 2.50 A is flowing along z-axis along a very long wire. in drawing the picture i know that there is a long thin wire with a current of 2.5 amps flowing...

Find the magnetic flux crossing the portion of the plane theta = x/4 defined by 0.01 m < r <0.05 m and 0 m < z < 2 m. A current of 2.50 A is flowing along z-axis along a very long wire. in drawing the picture i know that there is a long thin wire with a current of 2.5 amps flowing...

A uniform magnetic field of 0.0300T points vertically upward. Find the magnitude of the magnetic flux through each of the 5 sides of the open topped rectangular box, given the dimensions of the box are, length = 0.335m width = 0.12m, and Height = .10m. Find Wb through long side, short side...

Why is it that a changing magnetic flux through a surface should induce an emf? I know that the emf is from a non-conservative electric field, but how exactly was this field generated? (if that is the correct expression for it)

My physics teacher today taught my class the formula with magnetic flux density... Force on a wire in a magnetic field F = BILsin(theta) the part i am enquiring about is the B in which he explained to be B is the magnetic field strength (measured in Tesla's) He also said 1T =...

A square conducting loop with sides a lies on a table a distance s from a very long straight wire carryinga current I. a) Derive an expression for the magnetic flux through the loop. b) Derive an expression for the EMF induced in the loop if it is pulled away in a direction orthogonal to...

I'm sure I'm going to kick myself when someone shows me the way, but there's a limit to how long I can stare at this question... Determine the maximum magnetic flux through an inductor connected to a standard outlet (&Delta;Vrms = 120 V., f = 60 Hz.) That's all that's given. I know that...

The magnetic flux through each of five faces of a die (singular of "dice") is given by (sigma)B = N Wb, where N (= 1 to 5) is the number of spots on the face. The flux is positive (outward) for N even and negative (inward) for N odd. What is the flux through the sixth face of the die? I don't...