Electron Essay Examples

Resistance of Wires

Think of traffic on a motorway, for example. – The more the cars get in your way when you are trying to speed, the slower you will have to drive. The flow of charge in a metal is due to vast numbers of charge-carrying electrons flowing at low speeds. The size of an electric current… View Article

The resistance of a wire

This can be explained because as the length of a wire is increased then the distance the electrons will have to travel in an electric current will increase, so more collisions are likely to occur between them and the ions present. o I also predicted that the resistance of the nichrome wires would be inversely… View Article

Isoelectric Focussing

Isoelectric Focussing The method of separating proteins according to their isoelectric points in a pH gradient is called isoelectric focusing. This technique was discovered by H.Svensson in Sweden. This method has a high resolution power because ordinary paper electrophoresis resolves plasma proteins into six bands where as isoelectric focusing resolves it into 40 bands. In… View Article

Magnetic Force

1.An electron gun fires electrons into a magnetic field directed straight downward. Find the direction of the force exerted by the field on an electron for each of the following directions of the electron’s velocity: (a) horizontal and due north; (b) horizontal and 30° west of north; (c) due north, but at 30° below the… View Article

Electron Microscopy

Electron microscopy is used to examine specimens which require greater detail than can be seen when using the light microscope. In comparison to light microscopes electron microscopes provide a clearer picture, greater magnification and greater resolution. There are two types of electron microscope; the scanning electron microscope and the transmission electron microscope. Electron microscopes use… View Article

Gunshot Residue Aanalysis

When a firearm is discharged, residues from the bullet’s force, the primer, cartridge case, firearm itself and the powder from the propellant are expelled from gaps in the guns working parts (Pepper, 2005: 118). These particles are known as gunshot residue (GSR) or firearm discharge residue (FDR) and are composed of partially burnt and un-burnt… View Article

Electricity and Magnetism Spring Lab Project

Electric Field Hockey Objective: Write two paragraphs. Explain the challenges of scoring goals in this game. Be sure to include in your explanation the terms positive and negative charge, electric field line and explain how mass affects the motion of the “puck.” This simulation project is all about getting the puck into the goal while… View Article

Science Report on Electromagnetism

This report will be done on the theory of Electromagnetism. Electromagnetism is the force that combines electricity and magnetism. Electromagnetism is found in everyday things that shape our lives. It is the cleanest force used to make energy today, and it is used in almost every home appliance that is in a standard middle classed… View Article

The Microscope: Science’s Greatest Invention

The microscope has been one of the greatest inventions in the history of science and has had the most impact on the course of science. Ever since the first microscope was invented in 1590, they have improved our knowledge in basic biology and biomedical research, as well as many other things, all of which are… View Article

Hydrogen Bonding Essay

Hydrogen bonding is a bonding type consisting of dipole and dispersion forces. A hydrogen bond is the attractive force between a hydrogen atom attached to a molecule and an atom of a different molecule. According to the Pauling scale of electro-negativities of the elements, it can be viewed that the three most electronegative elements in… View Article

Atom and Chemical Bond

A chemical bond is the energy that holds two atoms together in a compound. This energy can be further broken down into ionic bonding and covalent bonding. An ionic bond is a chemical bond characterized by attraction between ions of opposite charge. The formation of an ionic bond involves a complete transfer of electrons between… View Article

Chemical bonding

Chemical bonds are what make up the world. In bonds, elements are held together and form compounds that may have new physical and chemical properties. There are two main kinds of bonds, they ionic and covalent. In bonding the goal of the atoms involved is to reach a level of stability with less energy. In… View Article

How electrostatics influence our lives

INTRODUCTION We all are familiar with the term electricity which comes from batteries and which is used to light bulbs, buzzers, and other electrical devices. We also know that conductors are those objects which conduct electricity easily and insulators do not conduct electricity at all. This is basic knowledge but right now we are going… View Article

Factors affecting the resistance of a wire

Introduction: Resistance is a force, which opposes the flow of an electric current around a circuit. Resistance is measured in Ohms. George Ohm discovered that a circuit sometimes resists the flow of electricity. He called this ‘RESISTANCE.’ He even came up with a rule for working out the resistance of a circuit, which was: R=… View Article

Investigating the rate of electrolysis

It is known that by passing a constant electric current through a copper sulphate solution the passage of ions through this solution results in copper atoms being dissolved into the solution from the anode, which has a positive charge while positive copper, ions (cations) are also being discharged at the cathode which has a negative… View Article