When an area delimited by a conductor suffers magnetic induction flux variation, an electromotive force (emf) or voltage is created between its terminals. If the terminals are connected to an electrical device or current meter, this electromotive force will generate a current, called induced current.
"In nature, nothing is created, nothing is lost, everything is transformed" (Antoine de Lavoisier). Lavoisier was born in Paris in 1743. Son of an upper-middle-class family he studied at the best French schools. He graduated in law, but never practiced the profession. Hooked by chemistry, he became a great scientist.
In this section we provide biographies of some famous physicists. Click on the desired physicist's name to view his biography. Albert Einstein Alessandro Giuseppe Antonio Anastasio Return Alexander Graham Bell André-Marie Ampère Antoine Laurent de Lavosier Archimedes Benjamin Franklin Blaise Pascal Charles de Coulomb Galileo Galilei
It is due to the first studies on electrostatics that all the electricity we use daily could develop to the point of being transmitted by cables and reaching homes hundreds of kilometers away from the place of energy production. It is also thanks to electrostatics that basic interactions between bodies are known, which prompted scientists to create the atom model as we know it today with the electrosphere.
The study of electrodynamics made possible the creation, transmission and storage of electric energy. Among the applications of electrodynamics, one of them is widely used in companies, homes and even in the streets, which is the transmission of energy by electric cables. One of the biggest challenges, which has been having some success for some time now, is the development of materials that conduct electricity more efficiently and with the lowest possible heat.
The study of spherical lenses is one of the great assets of geometric optics. Through knowledge of the behavior of light rays we can understand that through them it was possible to improve almost all optical instruments, and enable the invention of equipment that brought surprising technological advances, such as microscopes and telescopes.
As it was noted that the magnetic force influenced certain means of electrical conduction, this study was necessary to make it possible to further increase the efficiency of the conductors of the time. It was also because of this knowledge that various advances in electronics and robotics were possible and further studies on them are underway.
Isaac Newton (1642 - 1727) was born on December 25, 1642, the same year that the famous scientist Galileo died. During childhood, he was raised by his grandmother and attended school in Woolsthorpe. As a teenager, he attended Grantham Grammar School. He was tasked with helping run the family business, which he did not like.
The study of gases is the part of science that studies all variations of perfect gases, from their molecular structure to the transformations they may undergo. Through these studies, inventions were made that helped move industries that required moving fluids while a basic requirement was cleanliness.
The main application of magnetic or electromagnetic induction is its use in obtaining energy. Currently all power plants use induction studies as a way of working as it is an efficient way and has several ways to be put into practice. Another great use of this branch of physics is in the development of transformers and self-transformers, which are increasingly improved and their use is already fundamental in almost all major industries.
The study of sound-related wave phenomena ranges from understanding how our ears function as sensors that transmit signals to the brain to understanding what music is. This area delights many scientists because it can explain issues such as timbre - which makes a musical note produce a different sound when played by a piano or flute - and also explains issues such as echo and reverberation, as well as Doppler effect, which causes the apparent frequency of a source to differ when it is moving.
Gustav Robert Kirchhoff (1824 - 1887) was a German physicist with scientific contributions mainly in the field of electrical circuits, spectroscopy, blackbody radiation and elasticity theory (Kirchhoff plate model). Kirchhoff proposed the name "blackbody radiation" in 1862.
The study of light diffraction, when changing the propagation medium, is very useful for describing phenomena such as the colors that form in a soap bubble or oil slick, which come from the interference between reflected light and light. refracted. Through refraction it is possible to describe the polychromatic characteristic of sunlight and to verify the monochromatic colors that form it, also elucidating the principle of rainbow formation.
The study of waves, both mechanical and electromagnetic, is one of the most developed parts of physics in recent centuries and one of the most enabling enhancements in current models. Knowing the properties of waves enables the study of natural oscillation frequencies of civil engineering works and is widely used to avoid future problems in them.
Reflection of light is present in all that we see, as our eyes are able to capture images due to sunlight or other sources diffusedly reflected by objects; In this way, mirrors and the formation of images through them can be studied. This knowledge was fundamental to the implementation of various equipment we use today, such as projectors, overhead projectors, binoculars and mirrors that enlarge or reduce images.
The study of simple harmonic movements has been instrumental in several technological innovations, from the construction of grandfather clocks to spatial studies that enabled, among other things, the creation of artificial satellites and space probes. MHS is also introductory to the study of nonharmonic systems, which can be studied by harmonic wave composition and adapted by known laws.
James Prescott Joule (1818 - 1889) was born in December 1818 in Salford, England. He was the son of a leading Manchester brewer, and always expressed an interest in machines and physics. Joule had contact with great physicists like John Dalton who taught him science and math. Joule studied the nature of electric current.
Thermodynamics is the part of physics responsible for applying heat and temperature studies in the context of industry and the transformation of thermal energy into usable energy. The applications of thermodynamics became evident during the Industrial Revolution, that by using large thermal machines a great boost in industrialization was possible throughout the world.
Born on February 15, 1564 in the city of Pisa, Italy. Galileo was an Italian physicist, mathematician, astronomer and philosopher who played a unique role in the scientific revolution. His most cited work and one of the most revolutionary for the time in which he lived is the proposition of the Heliocentric theory, which describes a model of the universe where the sun is the still center, not the earth as was believed at the time.
But then how does the Big Bang theory work? As already mentioned, although the expression refers to an explosion situation, the Big Bang theory seeks to explain the development of the universe from the moment immediately after its emergence to what we know today. Thus most scholars of the subject conceive of the Big Bang as the moment when all matter and all energy in the universe were concentrated in one extremely small point, similar to what Lemaître had proposed.