All Questions
Tagged with electromagnetic-induction magnetic-fields
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Cause of induced EMF in a loop
Len'z law states that the change of magnetic field in a loop of wire produced current in a wire as the magnetic field in and out the loop.Although it just true experimentally, but
i) What happened ...
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Are there losses in an ideal transformer?
In a circuit with an AV power source $V$ and a zero-resistance ideal coil, the power from the source. $P_{in} = IV$ is equal to the rate of change in the magnetic energy $U_B$ stored in the coil. The ...
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How is the direction of current induced by the induced magnetic field determined in a metal detector?
In the figure below, from a textbook explaining Eddy Currents, a pulse of current is sent and generates a magnetic field $ B_0 $. The magnetic field produces a change in flux in the metal box that ...
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I can’t figure out the magnetic field around a non-straight wire
Say I have a circuit where the wire has a shape defined by some closed
Parametric defined as $(X(t), Y(t), Z(t))$ (it is a loop), how do I calculate the entire magnetic field around the circuit?
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Magnetization current when two magnets are brought together and the Lorentz force law
Suppose we have two ferromagnetic objects constituting two permanent magnets. A classical way to think of the two magnets repelling/attracting each other would be by ascribing bulk and surface ...
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Inducing electric field vs Inducing magnetic field
Is it easier to induce an electric field using a changing magnetic field or the other way around?
The question is from my high school booklet, and I am pretty sure it was to be answered on an ...
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Using the magnetic masses model how do i find the induced magnetic field due to a magnetic point charge?
I am deriving an equation modelling a magnetic guitar pickup and I am stuck.
I am trying to derive based on a paper for guitar pickups and it uses a magnetic masses method to find the magnetic flux at ...
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Superconductor Cube levitating in Vertical magnetic field
Suppose there's a Magnetic field in vertical direction and we hold and release a superconductor cube so experimentally it is seen that the cube floats/hovers in the same orientation as it was released ...
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How different is the induced magnetic field of a coil with a solid rod core and a sheet-wrapped one? (Assuming both use the same material)
I'm doing research for a university project and looking for commercial references for Mu metal, I found out that in my country at P2B (particular to business) level, sheets are significantly easier to ...
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Does the Change in Area Not Affect EMF Calculation in a Time-Varying Magnetic Field?
I had this Question as a Homework :
Given a conducting frame of width $𝐿$. A mobile conductor is mounted on the knitting needle that moves on the closing one at speed $\vec{𝒗} = 𝑣\hat{x}$ while ...
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Do magnets attract magnetic materials by inducing magnetism in them?
Here are 2 concise excerpts from a book I have been reading:-
1.A permanent magnet produces its own magnetic field. An induced
magnet is a material that becomes a magnet when it is placed in
a ...
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Is it right to say that magnetic field energy is created only by non-conservative electric field?
In all the examples of generation or existence of Magnetic Field energy I have seen so far, I couldn't find any example, where magnetic field energy is created without Non Conservative Electric field, ...
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What will happen if I pass Current through Permanent bar Magnet?
Following the Picture below,
If I Conduct current through Permanent magnet Bar and hold the battery still. Will the magnet move in any direction ? Thank you.
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Lorentz force separation from induction in rotating loop within AC magnetic field
I was wondering , is it possible to create a loop of any kind of geometry that could rotate in a non homogeneous AC magnetic field and have no net induction within the loop but only have current ...
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