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The left hand is held with the thumb, first finger and second finger mutually at right angles. The Thumb represents F - Thrust (or resulting Motion). The First finger represents B - Field. The Second finger represents I or V - Current (in the classical direction, from positive to negative).
The NCC improved Gassner's model by replacing the plaster of Paris with coiled cardboard, an innovation that left more space for the cathode and made the battery easier to assemble. It was the first convenient battery for the masses and made portable electrical devices practical, and led directly to the invention of the flashlight.
Fleming's left-hand rule. Fleming's left-hand rule for electric motors is one of a pair of visual mnemonics, the other being Fleming's right-hand rule for generators. [1] [2] [3] They were originated by John Ambrose Fleming, in the late 19th century, as a simple way of working out the direction of motion in an electric motor, or the direction of electric current in an electric generator.
The right hand is held with the thumb, index finger and middle finger mutually perpendicular to each other (at right angles), as shown in the diagram. [1] The thumb is pointed in the direction of the motion of the conductor relative to the magnetic field. The first finger is pointed in the direction of the magnetic field. By convention, it's ...
A battery of four water-filled Leyden jars, Museum Boerhaave, Leiden. Ewald Georg von Kleist was the dean at the cathedral of Cammin in Pomerania, a region now divided between Germany and Poland. Von Kleist is credited with first using the fluid analogy for electricity and demonstrated this to Bose by drawing sparks from water with his finger. [8]
Here’s how the middle finger became the most obscene digit. Naughty Grecians likely developed the phallic gesture around 2,500 years ago to offend each other. Here’s how the middle finger ...
The First Amendment includes the middle finger While other cases had discussed the protection of vulgarity, like giving the middle finger, the 2019 case of Debra Lee Cruise-Gulyas v.
If Tesla were to have met its goal of shipping 40,000 Model S electric cars in 2014 and if the 85 kWh battery, which uses 7,104 of these cells, had proved as popular overseas as it was in the United States, a 2014 study projected that the Model S alone would use almost 40 percent of estimated global cylindrical battery production during 2014. [81]