Essays on Magnetic Fields

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Neutron Stars: The ‘Death’ of a Death Star

Introduction: Neutron stars are dense, compact masses of subatomic particles (called ‘fermions’) compressed by great gravitational forces (Reisenegger 1). They are classified into three groups: the radio pulsars, which are rotating neutron stars that are predictable pulsators of radio waves due to its fast (Landau n. p.; Reisenegger 2) although sometimes slow (Fuller, et al. 1) rotation; magnetars, which neutron stars with the strongest magnetic fields in the universe and violently burst high-energy X-ray and gamma rays (Landau n. p.); nonrotating binary neutron stars, which are emitters of x-rays (Reisenegger 3); and PSR ...

Abstract

The study of tiny particles and their applications have emerged as an important area of research in recent years. In particular, magnetic nanoparticles have attracted considerable attention due to their unique properties that make the particles useful in numerous applications. Accordingly, the present review investigates the synthesis, characterization, and biomedical applications of magnetic nanoparticles. The introduction section examines recent advances in nanotechnology and explains the significance of magnetic nanoparticles in scientific research. The section on results and discussion presents the findings of various researchers with a focus on the magnetic properties, synthesis, characterization, and biomedical applications of magnetic nanoparticles. ...

Electromagnetic induction can be defined as the production of electromotive voltage or force across an electrical conductor when it dynamically interacts with a magnetic field. There are numerous uses of electromagnetic induction, for example, in electromagnetic elements such as transformers and inductors, electric motors, generators, and transcranial magnetic stimulators.

Applications of Electromagnetic Induction

Electromagnetic induction is an extremely useful phenomenon with various applications. It’s applied in the creation of eddy currents, which are swirling currents set up in conductors in response to changing magnetic fields. Electrons in the field swirl in a perpendicular plane to the magnetic field causing loss or transformation ...

Electrical power in New Zealand is generated majorly from renewable energy sources such as wind, geothermal and hydropower. Renewable energy sources contribute 75% of the total power generated in the country. As a result, New Zealand has one of the greenest energy infrastructures in the world. Energy demand in the country has been steadily rising by an annual margin of 2.1% from 1974 to 2010. However, energy demand fell by a margin of 1.2% in the period spanning from 2010 to 2013. New Zealand is above average in global energy intensity ratings. However, it has also been ranked among ...

Introduction

Taking measurements may require the conversion of the measured quantity to electrical quantity. Transducers are devices or elements that perform this function by transforming physical quantities such as quantities like sound, light, or temperature into electrical signals like current, voltage, or capacity. Transducers consist of inputs, sensing elements, transduction elements, signal processing, and electrical outputs. The inputs known as the measurands are the quantities, states, or properties that are to be translated into electrical outputs. The sensing elements accurately measure these input energies and sends the information to the transduction elements to be transformed into the desired form. The ...

Medical Equipment: MRI Machine

Over the past few years, technology has advanced significantly in almost all fields. The medical field has witnessed comprehensive technological advancement. It can be attributed to different factors, such as an increase in complicated diseases that call for comprehensive examinations and need for efficiency in medical operation. One of such products of technology in the medical field is the magnetic resonance imaging (MRI) machine. The equipment presents a lot of benefits to patients and the overall medical fraternity. MRI technology has advanced rapidly over the past few years. The current paper discusses the significance of MRI machine, the types ...

Introduction

This proposal is about the physics of microwave oven. This includes the interaction of microwaves with metals and the generation of microwaves in magnetrons. The reason for choosing a microwave oven is because they are used common places like in homes and restaurants for warming food. A microwave is a wave that belongs the class of electromagnetic waves. They have frequencies ranging from 300 MHz to 300GHz and wavelengths ranging from 1 m to 1mm. (Bradshaw, Van & Swardt, 201)

Physics of the Microwave

A typical microwave oven consists of the magnetron, fan, power supply, waveguide, turntable and a base plate. The microwaves are ...

Biomedical engineering is a discipline that encompasses engineering field and medical field in order to solve pertinent problems. It bridges the gap between medicine and engineering. The products of this endeavour include the design and development of therapeutic and diagnostic devices, prostheses, imaging equipment such as Magnetic Resonance Imaging (MRI) etc. The field of biomedical engineering thus has three main specialization areas which are (i) biomechanics, (ii) tissue and cellular engineering and (iii) imaging. These specialization areas are explained further in the following sections of this paper. i. Biomechanics Biomechanics is the study of mechanics in the human body ( ...

This video highlights the development of theory of interaction of electricity with magnetism. A number of scientists were involved in understanding, interpreting and validating electromagnetism with simple experiments involving current and magnetic elements. During September 1820, Ampere investigated magnetic effects of repulsion/attraction between like/unlike poles. He developed theory of electro-dynamics related to magnetism as interaction of current elements. Laplace was skeptical of his ideas while some other scientists like Fernel started thinking on converse patterns. Some other scientists like Jean Fernel focused on theory of production of electricity by magnetism and production of currents in conducting metals. Jean Fernel ...