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  • Current In Alternators
    514 words
    All useful generators of electricity come in two basic forms, alternating current and direct current. Direct current (dc) comes from generators that do not change in polarity, always producing a positive charge. In alternating current (ac) the polarity of the terminals is always changing from positive to negative. Thus you are left with alternating current flow. There are different ways of measuring and generating alternating and direct current. Direct current only flows in one direction in a ci...
  • Current Conduction Arm And The Electrode Holders
    409 words
    The modern steel plant receives low current, high voltage power from the generators of the electrical utility company. The purpose of the steel plant primary transformer is to step-down this voltage. The transformer thus provides high current, low voltage power for the EAF furnace. Large furnaces with transformers rated at 100 MVA or higher is not uncommon. There are usually two stages to this process. The transformer first steps-down the voltage from high to medium levels. There are different s...
  • High Voltage From The Ignition
    1,996 words
    Ignition Systems: New and Old Jeff Tuttle Period 39/9/04 Ignitions systems in motor vehicles have evolved in the past thirty years. Points was a simple concept but was not reliable and needed adjustment and replacement of components seemed constant. Today a magnetic sensor relays a signal to the computer which in turn sends the voltage to the selected cylinder to ignite the fuel / air mixture. There are not mechanical parts to fail or become corroded and brittle. There are many different parts t...
  • Bottom Of The Iron Rod E Current
    448 words
    PHY 2049 Faraday's Law 1) ABSTRACT: Relative motion between a magnetic field and a conductor are needed to create a voltage within the conductor. For current to flow the conductor must be a complete loop, if not the current will not flow. 2) THEORY: Faraday's Law (V = -N (Df / Dt) ) 3) PROCEDURE: A. A coil is connected to a galvanometer, completing the loop. A magnet is passed through the coil. B. A coil is connected to a galvanometer, completing the loop. Many magnets are passed through the coi...
  • Result For The 1 Ohm Resistor
    3,122 words
    Aim: To investigate the relationship between Current and Voltage Scientific Knowledge The current and voltage of an electric circuit, is given by the formula V = IR. This is known as Ohms. Ohms Law is only applicable, when the temperature of the resistor is kept constant. Therefore Ohms law is only applicable to Ohmic conductors. An example of Ohmic conductors are metals and alloys at constant temperatures. Anything that doesnt obey Ohms law, are know as non-Ohmic Conductors. An example of these...
  • Membrane In An Action Potential
    2,098 words
    WHEN the commonplaces of one discipline are applied to an unrelated field, they can prove curiously fruitful. In 1952 two British physiologists, Alan Hodgkin and Andrew Huxley, managed just such a fruitful crossover, applying textbook physics to living tissue. They were both later knighted, and shared a Nobel prize in 1963. The experimental method they pioneered remains fundamental to research into the behaviour of nerve cells. As anyone who has ever had an electric shock knows, electricity has ...
  • Instance The Secondary Voltage Of A Transformer
    1,392 words
    Introduction The Reason and Use of Transformers A transformer is a device that raises or lowers voltage and is used mostly with alternating current, or ac. A transformer has no moving parts, is simple, rugged, durable, and can be up to ninety-nine percent efficient. Cities use a large amount of power, and power is based on the amount of current in electricity. A transformer works by changing the amount of voltage and current of electricity. When voltage is increased current in electricity is dec...
  • Measures Of V 3 And A 3
    922 words
    Purpose: To find the relationship between (1) total voltage and their individual amounts, (2) total current and their individual amounts, and (3) total resistance and their individual amounts. Procedure: We first gathered our materials that included a battery, resistors, an amp meter, and a volt meter. We then set up our lab, starting with the series circuit (see diagram). To start off the lab we measured the total current and total voltage. We used the same resistance throughout the whole lab, ...
  • Ic 5 Calculate
    1,393 words
    The Bipolar Junction Transistor Purpose The objective of this lab is to introduce the Bipolar Junction Transistor (BJT). A BJT is a three terminal device composed of an emitter, base, and collector terminals. In this lab we will introduce two major types of BJT?'s: npn and pnp. The first, npn, has an n-type emitter, a p-type base and a n-type collector. On the other hand the pnp has a p-type emitter, a n-type base, and a p-type collector. Also the transistor consists of two major pn junctions, t...

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