Junior High School Physics Electricity Contribution Scientist Profile

Ohm was a German physicist who proposed Ohm's law, which is famous in classical electromagnetic theory. To commemorate its important contributions, people use their names as units of resistance. The ohmic name is also used in other physical and related technical content, such as "ohmic contact", "ohmic sterilization", "ohmic table", etc.

James Prescott Joule; 24 December 1818 11 October 1889) was an English physicist born in Salford, a suburb of Manchester. For his contributions to thermal, thermodynamics and electricity, the Royal Society awarded him the highest honour, the Copley Medal. In order to commemorate him, later generations named the unit of energy or work "joule", referred to as "coke"; And mark the heat with the first letter of Joule's surname, "J".

Hans Christian Oersted (1777-1851) was a Danish physicist and chemist. He was born on August 14, 1777 in Rudchobin, Langeland, Denmark, to a family of pharmacists. At the age of 12, he began to help his father work in the pharmacy while continuing to study chemistry.

As a result of his hard work, at the age of 17, he was admitted to the University of Copenhagen as a free student with excellent grades to study medicine and natural sciences. While working as a tutor, he studied pharmacy, astronomy, mathematics, physics, chemistry, etc. at school. He received his doctorate in 1799.

From 1801 to 1803 he traveled to Germany, France and other places, and returned to China in 1804. In 1806, he was hired as a professor of physics and chemistry at the University of Copenhagen, where he studied electrical currents and sounds. Permanent Secretary of the Royal Danish Society from 1815.

In 1820, he was awarded the Copley Medal of the Royal Society for his outstanding discovery of the magnetic effect of electric currents. In 1824, he initiated the establishment of the Danish Association for the Promotion of Natural Sciences, and in 1829 he became president of the Copenhagen Institute of Technology, a position he held until his death in Copenhagen on March 9, 1851. He was 74 years old.

Michael Faraday (1791 AD) was an English physicist, chemist, and self-taught scientist. Born in Newington, Surrey, to a poor blacksmith family. Attended only elementary school.

In 1831, he made a crucial breakthrough in the force field that changed human civilization forever. In May 1815 he returned to the Royal Institution to conduct chemical research under the direction of David. He was elected a Fellow of the Royal Society in January 1824, Director of the Laboratory of the Royal Institution in February 1825, and Professor of Chemistry at the Royal Institution from 1833 --- 1862.

In 1846 he was awarded the Renford Medal and the Royal Order.

André-Marie Ampère (1775-1836) was a French chemist who made great achievements in the field of electromagnetism and contributed to mathematics and physics. The SI unit of electric current, the ampere, is named after his surname.

There are many more that are no longer listed, and can be checked on the encyclopedia.

Ohm! Watt! Ampere! Volt!

Mechanics: 1The "Split Barrel Experiment" designed and demonstrated by the French physicist Pascal proved that the pressure of a liquid is related to the depth of the liquid, but not to the gravity of the liquid.

2.The Italian physicist Torricelli designed the famous Torricelli experiment to measure the value of atmospheric pressure more accurately. 3.

On the basis of the research of Galileo and other scientists, the British physicist Newton conducted a large number of experimental studies and summed up Newton's first law: all objects always maintain a uniform linear motion or a state of rest when they are not affected by external forces. 4.

The ancient Greek physicist Archimedes discovered that the magnitude of the buoyancy of physics immersed in a liquid is equal to the gravitational force of the liquid that is discharged by the object, that is, Archimedes' principle. Electromagnetism:1

In 1840, the British physicist Joule experimentally found that the heat generated when the current passes through the conductor is proportional to the square of the current, proportional to the resistance of the conductor, and proportional to the energizing time, which is Joule's law. 2.The Danish physicist Oster was the first to discover the phenomenon of a magnetic field around an electric current in 1820.

3.The British physicist Faraday began to explore the phenomenon of electromagnetic induction in 1822, and in 1831 discovered the law of magnetism and electricity. 4.

The German physicist Ohm overcame all kinds of difficulties and worked tirelessly to summarize Ohm's law in 1827. 5.The French physicist Ampère has conducted in-depth research on the interaction between electric currents, etc., and has achieved fruitful results in a short time.

Heinly 'Hirrudolph' Hertz, discovered electromagnetic waves, the unit of frequency named after him James Clark Maxwell, the theory of electromagnetic fields.

Faraday, magneto-electric, invented the generator.

Nikola Tesla, mentioned in his high school physics textbooks, named Hans Oster after the unit of magnetic flux, discovered the phenomenon of electromagnetic induction.

That's all for high school.

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Danish scholar Oster. Discover the magnetic effect of electric currents.

1. Oster (Denmark) experiment shows that there is a magnetic field around the energized (1820), and "electromagnetism" is realized

2. Faraday (England) discovered the phenomenon of electromagnetic induction (1831) and realized magnetism and electricity

3. The content of Ohm's (German) law is: the current in a conductor is proportional to the voltage at both ends of the conductor, and inversely proportional to the resistance of the conductor The formula is: i=u r

4. The content of Joule's (British) law is: the heat emitted by an energized conductor is proportional to the square of the current passing through the conductor, the resistance of the conductor, and the energizing time The formula is: Q=I2RT

5. The units of electricity, current, voltage, resistance, and electric power are coulombs, amps, volts, ohms, and watts respectively

6. The Chinese who discovered the magnetic declination of the earth are: Shen Kuo

7. The speed of light in a vacuum is the ultimate velocity of the motion of an object, which was proposed by Einstein

8. China's Mo Zhai was the first to study the formation of small holes

9. Newton's contribution to the United Kingdom was to establish Newton's first law of motion

10. Galileo Galilei (Italy) took the lead in the study of the problem of the motion of objects without force, and came to the conclusion that all moving objects, when they are not affected by external forces, their speed remains the same and continues to move

11. Torricelli of Italy first measured the value of atmospheric pressure as Pa

12. The content of Archimedes' principle is: the object immersed in the liquid is subjected to the buoyancy of the liquid vertically upward, and the magnitude of the buoyancy is equal to the gravitational force of the object discharging the liquid The formula is: f float = g row

13. Dicard (France) studied that if an object is not acted upon by other objects, its motion does not change the direction of motion

14. The units of force, pressure, power, work, energy, and frequency are Newton, Pascal, Watt, Joule, Joule, and Hertz respectively

15. Resius of Sweden formulated the Celsius temperature scale

16. The founder of the thermodynamic temperature scale is Kelvin of the United Kingdom

17. The units of Celsius, thermodynamic temperature, and heat are Celsius, Kelvin, and Joule respectively

Albert Einstein was a well-known German-Jewish theoretical physicist, thinker and philosopher. [1] Awarded the Nobel Prize in Physics in 1921 for his "contributions to theoretical physics, especially the discovery of the photoelectric effect", he was the founder and founder of modern physics, the founder of the theory of relativity - the "mass-energy relation", and the defender of the "deterministic quantum mechanical interpretation" (vibrating particles) - God who does not roll dice. He founded the theory of relativity, which represents modern science, laid a theoretical foundation for the development of nuclear energy, and created a new era of modern science under the profound influence and wide application of modern science and technology, and is recognized as the greatest scientist and physicist since Galileo and Newton.

On December 26, 1999, Albert Einstein was selected as a "Great Man of the Century" by Time Magazine.

Optics: Newtonian dispersion phenomenon.

Heinly 'Hyrudolph' Hertz, discovered electromagnetic waves, and the unit of frequency was named after him.

James Clark Maxwell, Electromagnetic Field Theory.

Faraday, magneto-electric, invented the generator.

Nikola Tesla, mentioned in high school physics textbooks, named after the unit of magnetic flux.

Hans Oster, discovered the phenomenon of electromagnetic induction.

That's all for high school.