Can magnetic fields be redirected and focused at one point?
Yes, it is possible to guide magnetic field lines using a shaped magnetic material. Just as field lines concentrate when entering the south pole of a magnet from a large area, an external magnetic field can be "gathered" using, for example, a cone-shaped piece of iron.
Can Magnetic Fields Be Focused? - Physics Forums
2012年5月24日 · In summary, it is possible to focus a magnetic field by using a cone shaped piece of iron or two flat pieces of iron. This is achieved by manipulating magnetic flux and circuits. However, unlike light, a magnetic field cannot be focused to a specific point in empty space without the use of a device or object to guide it.
Exploring the limits of magnetic field focusing: Simple planar ...
2020年12月1日 · This work explores the possibility to arbitrarily shape in space low-frequency magnetic fields using a recently introduced synthesization technique (Choi et al., 2016). We investigate the ability to focus a magnetic field on a two-dimensional region using magnetic field sources distributed on a parallel plane.
Can magnetic fields be focused to distant points? - Physics …
2010年4月11日 · Yes, it is possible to focus magnetic fields to distant points using various methods such as magnetic lenses or electromagnetic waves. How do magnetic lenses focus magnetic fields? Magnetic lenses use the principles of electromagnetism to control and manipulate magnetic fields, allowing them to be focused and directed towards a specific point.
Introduction to synthesized magnetic field focusing technology
A synthesized magnetic field focusing (SMF) technology is firstly proposed in this paper. Once the magnetic field can be focused like beamforming, many related studies such as inductive power transfer system (IPTS) and the magnetic induction tomography (MIT) will be applicable.
Magnetic Field Focusing - Wiley Online Library
2017年6月2日 · A novel synthesized magnetic field focusing (SMF) technology is explained in this chapter and a non-radiative but focused magnetic field is experimentally demonstrated as a one-dimensional example. Contrary to common belief, a magnetic field can be focused arbitrarily by increasing the number of current-controlled transmitting coils in a manner ...
electromagnetism - Can a magnetic field be focused at a distance ...
Is it possible to focus a magnetic field such that it would be able to, say, move a nail from a kilometer away? If not, what is the fundamental difference between light and magnetic field that is responsible for this limitation?
Re: Is it possible to focus a magnetic field to a point?
2006年11月1日 · Depending upon the magnetic and electric fields present inside a cavity, they have a relation between amplitude (strength of the magnetic field) and the dimensions of the cavity. However, changing the dimensions will have a profound effect that will cause power loss of the waves, changing both the frequencies and amplitudes.
Modelling, optimization and application on C-shaped focusing magnetic ...
2024年5月31日 · To enhance accuracy and sensitivity of electromagnetic torque sensor, a highly focusing magnetic field is essential. This paper proposes a C-shaped excitation device designed to focus the magnetic field. The device is enclosed by dual layers of ferromagnetic metal shields.
Focusing Magnetic Fields | Physics Van | Illinois
Truncated cone-shaped pole pieces are routinely used with electromagnets to get higher field strengths, just as you propose. In principle the same method should work with the Earth's magnetic field. One technical problem is that typical magnetic materials don't …