Electric current Essays

Early measuring instrument for small electric currents consisted of coil of insulated copper wire wound on a circular non-magnetic frame. Working based on the principle of the tangent law of magnetism. Galvanometer works on the principle of conversion of electrical energy into mechanical energy. When the current flows in a magnetic torque. Galvanometer has a word called sensitivity of galvanometer is defined as the current in micro ampere required to consume one millimeter deflection

5 mm along the cable 4. Outer semiconductor: uniformly distribute the voltage on the surface of the insulation 5. Earth layer: made from copper, used to ground the cable, in case of short circuit it protect the cable by leaking the short circuit current into the ground, its thickness is about 25mm2 area 6. Filling: synthetic fibers used to make the cable circular and to fill the gap between the phases 7. Inner layer: made from PVC, collect the phases of the cable and make the cable circular and protect

I. Purpose: To measure conductivity of solutions. To classify substances as conductors, partial conductors, or nonconductors. To relate conductivity to bond type. II. Materials: The materials used in this lab were a computer, Vernier Conductivity Probe, LoggerPro, distilled water and the solutions listed in the data table. III. Procedure: As follows in “05 Conducting Solutions” from the Biology with Computers folder of LoggerPro. IV. Data: See attached data table. V. Analysis: 1) Ions are

7.4.1.1 Dielectric withstanding voltage The purpose of this test is to prove that a connector can operate safely at its rated voltage and will be able to withstand momentary over potentials due to switching, surges and other similar phenomena. The applied voltage can be either AC or DC. The voltage should be applied across the two closely spaced contacts as well as between a connector shell and the contacts closest to the shell. The test voltage in the case of coaxial connectors shall be applied

Science fair proposal By: Gilbert Villalobos 10-19-17 Abstract My goal was to find out if temperature affects the strength of a magnet. If the strength of the magnet either has more effect either in the pot of boiling water or in the bowl of ice, which ever magnet gets the less paper clips attached to it will have the greatest effect. Background A magnet is a material or object that produces a magnetic field. This magnetic

Typical sample dimensions 9.51 × 4.83 mm2in surface area and1.58 mm in thickness were coated with conductive silver paint formetallic contacts. The dielectric constant of the sample was mea-sured for the applied frequency that varies from 100 Hz to 1 MHz atdifferent temperatures (40◦C, 60◦C, 80◦C). The observations weremade while cooling the sample. The dielectric constant εrwas cal-culated using the relation, εr = Ct ε0A (9)where ε0is the permittivity of the free space, C is the capacitance, t isthe

What is electromagnetism? Merriam-Webster states that “electromagnetism is magnetism developed by a current of electricity.” An alternative definition suggests that electromagnetism is a fundamental physical force that is responsible for interactions between charged particles which occur because of their charge. To fully understand how electromagnetism affects us, it is important to understand the basic foundation of electromagnetism. The field of electromagnetism was only six years old when Henry

with multiple definitions. In physics, Electricity is a naturally occurring phenomenon of the flow of electric charge. In other words, the process of attraction and repulsion between electric charges produce electricity. There are two types of charges- negative charges and positive charges. Like charges repel each other, whereas, unlike charges attract each other due to the presence of an electric field. Annotated Timeline 1600- William Gilbert can be correctly called the father of electricity

the strength of the magnetic field (the electromagnet’s strength) will also increase. This means that the number of paper clips that attach to the electromagnet will increase. Explanation of Hypothesis/background: When a DC (Direct Current) electric current flows through a wire, a magnetic field is created. Wrapping the wire in a coil concentrates and increases the magnetic field, because the additive effect of each turn of the wire. (When a coil of wire is used to create a magnetic field, it

A magnet is a material or object that produces a magnetic field. It is a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets. A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include iron, nickel, cobalt, some alloys of rare earth

Usually, it is possible to calculate the currents and voltages in a circuit by solving a set of equations, the calculations are required to design a safe circuit.and this is one reason why advanced mathematics is so important in the field of electrical engineering. The circuit equations can be determined using Ohm’s Law, which gives the relationship between voltage and current in a resistor (V=IR), and Kirchhoff’s Current and Voltage Laws, which govern the currents entering and exiting a circuit node

English physicist J.J Thomson started several different cathode ray experiments in order to find out the ration of the charge to the mass of the particles. After a series of experiments, he was able to determine this by measuring the effect of an electric field and a magnetic field on a cathode ray. After comparing this ratio to other ratios, he was able to conclude that a hydrogen atom, which is the lightest atom, was heavier than the mass of a charged particle. This was a very surprising result

separate the negative and positive charges on the capacitor. In lab 21 we will observe this type of charge in snap circuits by using the snap circuit kit from our lab and a stopwatch. In part two of this lab, I observed how the relationship how current, voltage and resistance are used to through a system in regards to Ohm’s Law. Introduction In lab experiment 1 we will compare difference of the capacitors of the snap circuits in series and parallel charges. The circuits will have the capacitors

Copper Wire Subway. The Flaming Lizards Miranda Zuroske, Halie Lindberg, Maira Hernandez 2nd Hour The copper wire subway is a way to make great fun and somewhat simple way to show how a magnetized pull can move an object. Our objective is to make the battery strong enough with the magnetic pull of four magnets to propel it through a length of copper wire. Materials 5lb Rare Earth Magnets Neodymuim-Iron-Boron-Rare-Earth-Magnet Rayovac Double Aa Battery Rayovac Triple AAA Battery

components which are Kirchhoff’s Current Law and Kirchhoff’s Voltage Law. These two laws are collinearly related through its total summation being which is equal to 0, except that for Kirchhoff’s Current Law having its variables to be of currents flowing into and outward a node (fig.1), and for Kirchhoff’s Voltage Law having its variables in terms of the drops and rises of its voltages in a closed loop (fig. 2). ∑▒I_in +∑▒I_out =0 Figure 1: Kirchhoff’s Current Law ∑▒V=0 Figure 2: Kirchhoff’s

B= (8µ_0 NI)/(√125 a) (2) where µ_0 is the permeability of free space 4π×〖10〗^(-7)WB/A-m, N is the number of turns 72 for this experiment, I is the current and a is the mean radius of each coil .33 meters. The magnetic field through the Helmholtz coil is shown in Figure 1. The region of this magnetic field that we are concerned with is in the center where the magnetic field lines are nearly uniform.

Pietro Russolo Science Y10 John Charters 6/11/15 Alessandro Volta Alessandro Volta, born on February 18th, 1875 in Como, Lombardia, Italy, was a physicist and chemist. He was known for creating the first electric battery, which in the 1800s was referred to as the “voltaic pile”, though now known as a “cell” in scientific terms. Alessandro Volta did not initially set out to create a battery, but carried out experiments in order to prove that another Italian scientist, Luigi Galvani’s theory of

3.0 Discussion on the important for nurses to be more visible   Barker emphasizes that to be appropriately valued in health care and by the public, it is critically important for nurses to be more visible "in every role and place of employment."Barker E,2001. 3.1 Power and empowerment Power and empowerment are connected to the image of nursing.Nurses typically do not like to talk about power,they find this to be philosophically different from their view of nursing.Power is about control to reach

by 40, you would find the full-time equivalence for that task and job type. I would have GGBP also identify any current part-time employees that could be transitioned into a full-time role. Then I would compare the needed manpower to what GGBP currently has to find where they will need to hire. Once hired, I would have the new full-time employees onboarded and trained while the current part-time employees continue to work. There will be an overlap of employees, but this will allow time for the new

The aim of this assignment is to describe an ethical dilemma from nursing practice and by using an ethical framework critically analyse the main issues arising from the problem. The essay will discuss the definition of ethics and it will briefly discuss the main theories of ethics. It will examine an ethical dilemma surrounding organ transplantation and it will analyse the conflicts by using the main principles of ethics. Finally, it will give recommendation in relation to ethics and its application