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A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field due to a solenoid is the vector sum of the magnetic fields due to its individual turns. Therefore, for an ideal solenoid, the magnetic field within the solenoid is directly proportional to the number of turns per unit length and the current. Conversely, the magnetic field outside the solenoid is zero.
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A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
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Magnetic Flux

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The magnetic flux measures the number of magnetic field lines passing through a given surface area. The SI unit for magnetic flux is the weber (Wb). Magnetic flux is a scalar quantity. It depends on three factors: the strength of the magnetic field B, the area through which the field lines pass, and the relative orientation of the field with the surface area.
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Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
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The representation of magnetic fields by magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. Each of the magnetic field lines forms a closed loop. The field lines emerge from the north pole (N), loop around to the south pole (S), and continue through the bar magnet back to the north pole.
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Assessing the Influence of Personality on Sensitivity to Magnetic Fields in Zebrafish
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The Magnetic Field Freezes the Mercedes-Benz Water Model.

Tomaz Urbic1

  • 1Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna Pot 113, SI-1000 Ljubljana, Slovenia.

Entropy (Basel, Switzerland)
|December 23, 2023
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This summary is machine-generated.

Strong magnetic fields can freeze water, according to molecular dynamics simulations. Weak magnetic flux has no effect, but higher intensities alter water

Keywords:
anomaliesmagnetic fieldwater

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Area of Science:

  • Computational chemistry
  • Physical chemistry
  • Materials science

Background:

  • Water's unique properties, including its density anomaly, are crucial for life.
  • Understanding how external fields influence water structure and thermodynamics is an ongoing scientific challenge.

Purpose of the Study:

  • To investigate the effects of magnetic fields on the structural and thermodynamic properties of water.
  • To model water's response to varying magnetic flux intensities using an extended Mercedes-Benz model.

Main Methods:

  • Utilized the Mercedes-Benz (MB) model, a 2D representation of water with angle-dependent interactions.
  • Extended the MB model by incorporating charges for magnetic field interaction.
  • Performed molecular dynamics simulations to analyze thermodynamic properties under different magnetic flux intensities.

Main Results:

  • Weak magnetic flux showed no significant impact on water properties.
  • Stronger magnetic flux induced freezing of water molecules.
  • The density anomaly of water disappeared at a specific magnetic flux magnitude.
  • Increased magnetic flux led to the formation of a glassy state in the simulated water particles.

Conclusions:

  • Magnetic fields can significantly alter the fundamental properties of water, including its phase behavior and density anomaly.
  • The study demonstrates the potential for external fields to control water's state, with implications for materials science and physical chemistry.
  • The Mercedes-Benz model, extended with charges, provides a viable framework for simulating field-matter interactions in condensed phases.