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Found 14 results

  1. A considerable amount of current can flow in an open circuit under certain conditions. I will present you a very simple experiment which undoubtedly proves that. But before that, let me give you a little introduction. Electricity is a fluid. Just as the water and the air can flow through pipes, so the electricity can flow through metal wires or other electrically conductive things. However, water and air are material fluids, whereas electricity is an immaterial fluid. Water is dense, air is less dense than water and the electricity is the least dense, actually it crosses the border of mat
  2. The battery can be regarded as a container of dissolved agent (acid, base or salt) wherein two plates of different metals are partly immersed [footnote 1]. Instead of one metal plate, a graphite rod can also serve. Just as there is an exception to every rule, so it is in the electromagnetism. Coal is a special and unique case of a non-metal that is conductor of electricity. Consequently, it is also a good electrode in a battery. [ [footnote 1] According to the etymological meaning of the words, what we describe here should not be called a battery, but a cell (an electrochemical cell). A batter
  3. I believe everyone is quite familiar with many optical illusions. This is one of the most known optical illusions. When we stand on railway tracks, we have the impression that the tracks in the distance get closer and touch each other. If we stand on a hill and look down at the town under us, we see the nearby houses bigger than the houses in the distance. Is this an illusion?! How would we otherwise have a real sense, what near to us and what farther away is?! Thanks to this “illusion”, we can truly perceive the reality. The “illusion” with
  4. Digital logic circuits are electronic circuits for implementing the binary logic by means of electricity. What is binary logic? I will try to give a somewhat different view on this question. This will be at the same time a short and easily comprehensible course on digital electronics basics, so if you don’t have enough time now, please bookmark this page for later. • • • • • If we stand in front of a cooling fan, then the air current is blowing/pushing us. However, an observer standing behind the fan will say that the air current is suctioning/pulling him. The blowing force is P
  5. To understand the physics behind a homopolar motor, first and foremost you have to understand that besides the electric current in a current-carrying wire there is also a magnetic current (which the contemporary science calls magnetic field). The two currents are inseparably bound to each other very similar to the water swirling current and the cavitation spiral current which an underwater propeller creates. The water swirling current corresponds to the electric current, whereas the cavitation spiral current corresponds to the magnetic current. Watch the cavitation spiral current in this short
  6. If we swing a glass plate like a hand-held fan, then we cause an alternating current in the air, that is, we cause longitudinal waves in it. If we swing it pretty fast, then we cause sound waves as well (which are also longitudinal waves). If we now rub the glass plate with a woolen cloth, then the plate is electrified. If swing it again, we cause besides the air- and the sound-waves, also electromagnetic waves, which are also longitudinal waves. • • • • • I will jump for a moment to another question, to the one what an electric current is (for more details please see "What is electric cur
  7. I will begin this answer with a brief extract from my answer to what a battery is, because I need it for what follows (for more details please see What is a battery?). A battery can be regarded as a container of a dissolved agent wherein two metal plates (say copper and zinc) are partly immersed. The part of the copper plate outside the liquid is polarized in one sense (plus +), the immersed part in the opposite sense (minus -). For the zinc plate applies the opposite. Plus means blowing, Minus means suctioning (in relation to this, please see Is positive and negative electricity nomenclatur
  8. No, Faraday’s law of induction is not true. One of the fundamental laws of electromagnetism is the “Faraday's law of induction”. This law states that the induced voltage in a wire loop is equal to the speed of change of the magnetic flux enclosed with the loop, or V=dΦ/dt. In the textbooks is often given an example of a loop in the shape of a rectangle which rotates in a magnetic field. (please click on the images for a bigger view) What is meant by “the speed of change of the magnetic flux enclosed with the loop”? To explain this, we will make a comparison. If we hold a ring in front of our
  9. No, it cannot be arbitrary at all. (in this answer I will use the words “plus” and “minus” instead of “positive” and “negative”) “Plus” is the effect towards outside (expansion, blowing, explosion), “Minus” is the effect towards inside (contraction, suctioning, implosion). For example, the act of inhaling is plus, because our chest expands; the act of exhaling is minus, because it reduces in size. From the history of electromagnetism it is known that Benjamin Franklin (1705-1790) is the man who was the first to introduce the terms “positive” and “negative”, i.e. “plus/minus” in the field o
  10. Electric current is an immaterial swirling wind through the electrical conductor. The immaterial magnetic wind through it is also spiral-shaped (i.e., it is not perpendicular to the conductor as the contemporary physics asserts). During the flow of direct current, both winds blow from the plus- to the minus-pole of the battery, the electric wind in counter-clockwise direction, whereas the magnetic wind in clockwise direction. These two fluxes are at angle of 90 degrees. I will introduce a new explanation of the electric current which I call “dynamic” because it speaks of forces (δύναμις =
  11. When a body moves through space filled with air, then higher pressure is created in front of it, while lower pressure (depressure) behind it. The higher pressure is PLUS, the lower pressure is MINUS. I use to call this a ‘principle of an arrow’ (− >—> +) (click on the images for a bigger view). The greater the velocity of the body is, the stronger is the plus in front of it as well as the minus behind it. This principle can be found in many things, among others also in the so-called “Bernoulli’s principle”. What is “Bernoulli’s principle” in its basic form? The picture below shows it.
  12. Let us consider some experiments. We place a stiff copper wire on a table. Parts of its length don’t touch the table. Above a wire section that does not touch the table we hold a strong cylindrical magnet with its plus-pole down (N-pole), so that the wire lies exactly under the middle of the magnet. Then we connect a new battery to the ends of the wire so that the plus-pole is closer to us and the minus-pole further away from us. At the moment of connection we will notice that the wire makes a strong deflection to the left and up. As soon as we turn the magnet over and repeat the same, the wir
  13. Why component od E perpendicular to r is: Etheta= 1/r*dv/dtheta
  14. Hello Everyone, I was hoping that someone could help me with a science question. Is it feasible to use tubes of Ionic Fluid to replace standard metal wiring? If so, would it transfer the electrical? Would this charge be less or more efficient to a normal metal cable and by how much? Knowing all of this, would it be plausible to create a Tesla Coil that is primarily composed of tubing filled with an Ionic Fluid in place of the copper cable/wire? Would it still create a decent voltage, and how would it compare to the original fully metal design? Can't wait to hear everyone thoughts on the
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