Предмет: Физика, автор: vipnelson2014

Формула электромагнитной индукции

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Автор ответа: geniwanov2015

ЭДС Ei в замкнутом контуре отрицательна и равна изменению магнитного потока Ф: Ei= - ΔФ/Δt, считая, что направление нормали к контуру по которому перемещается заряд совпадает с направлением внешнего магнитного поля В, а индукционный ток направлен против направления положительного обхода. Если движется сам проводник, то на заряды действует сила Лоренца и индукция в контуре будет равна Ei=Blv. Здесь l длина части контура, скользящего с постоянной скоростью v. Если между векторами В и v угол α не равен нулю, то Ei=Blv*sin

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Robert Fulton – Steamboat Inventor
By: Sue Peterson
Robert Fulton was born in Pennsylvania in 1765. He learned to read and write at home. Later, he was sent to a Quaker school for his education. Fulton showed an early interest in inventions and built a rocket for the Fourth of July when he was a teenager. Fulton enjoyed thinking about ideas for new inventions.

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Fulton eventually moved to France and worked on canal systems. There, he used his talents for art and invention to design a submarine, which is a boat that can go underwater. Then he built a steamboat, a large boat that is powered by heating water to make steam which makes the paddlewheels move.

When Fulton moved back to the U.S., he took his steamboat invention and established the first steamboat service in the world on the Hudson River in New York. People paid money to travel by steamboat.

The first steamboat trip took 32 hours to cover 150 miles (240 kilometers) in 1807. That is equal to moving at about 5 miles (8 kilometers) an hour. That is as fast as a person can walk.

Robert Fulton is known as an American inventor who developed the first steamboat service to help people travel from one place to another. He is also called the “Father of Steam Navigation”.

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A steamboat is powered by ............................................
Robert was interested in .............................................
Robert's drawing were always ..............................
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