UBT1 Task 1: Electricity Introduction What is Electricity? This question is difficult to answer because this is a broad concept of science 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.
The proportionality constant, R, is known as the resistance and is determined by both material properties (the intrinsic resistivity) and geometry (length and cross-sectional area of the active material). In equation form, Ohm’s law is: V = IR. It is important to understand just what is meant by these quantities. The current (I) is a measure of how many electrons are flowing past a given point during a set amount of time. The current flows because of the electric potential (V), sometimes referred to as the voltage, applied to a circuit.
An increment of 3cm for every x coordinate (x=0, 3, 6, 9, 12, and 15) and voltage readings of .25, .30, .50, .75, and 1.00 will be measured. Below are two tables (because two different metal plates are used) of data that illustrate the voltage readings collected during the experiment. The readings on the voltmeter measure the electric potential of two different charge distributions and this measurement can be used to find the electric field. Electric field lines starts on a positive charge and end on a negative charge. The number of electric field lines tells us the amount of
The purpose of this experiment was to use charged electrodes on conducting paper and voltmeter to discover electric field. The experiment also discovered the relationship between equipotential lines and electric field lines. The purpose of the experiment was to find if the theory that equipotential lines always run perpendicular to electric field lines hold true. The equation used in this experiment is E = ∆V/∆d. The experimental value yielded a result of y = -100x + 10 and the theoretical yielded a -100 V/m.
Another definition for electromagnets are solenoids wound around a central iron core. The magnetic field generated by the coil of wire magnetizes the core, increasing the total field. The difference in simple terms: a solenoid is a long, thin helical loop of wire. An electromagnet is a magnet whose magnetic properties depend on an electric current. A solenoid is just a coil of wire, but when you run a current through it, you create an electromagnet.
Galvanometer gives the deflection which is proportional to the electric current flowing through it. It works as an actuator by producing a rotary deflection. Also, known as a (pointer) in response to electric current flowing through a coil in a constant magnetic
Engineers came up with idea of using different types of fluids that can change its property according to the external forces. For example MR (Magneto-Rheological) fluids and ER (Electro-Rheological) fluids. MR fluids are materials that expose a change in rheological properties such as elasticity, viscosity or plasticity with the application of a magnetic field. On the other hand, ER fluids alters its rheological property when an electric field is applied to the fluid. MR fluids require small voltages and current, while ER fluids require very large voltage and very small currents.
Introduction When a charged particle is moving through a magnetic field, it experiences a magnetic Lorentz force given by F ⃗=qv ⃗ ×B ⃗ (1) where q is the charge of the particle, v is the velocity of the charge q and B is the magnetic field. In this experiment, an electron source, which is the heated filament, an electrode and Helmholtz coils are used to generate the magnetic field. Both the electrode and heated filament are placed in a near vacuum container containing a small amount of mercury.
Precipitate is solid material that forms when chemical reactions happen. Reagents are basically compounds that react. Temperature, color, fume, and precipitate changes are possible changes noticeable in chemical reactions. Conductivity Testing Multimeters test direct current, or DC voltage, which is a galvanic current. It measures electric charge like a battery.
Ionic bonding In an ionic bond, electrons are transferred from one atom to another so that they form oppositely charged ions. The strong force of attraction between the oppositely charged ions is what holds them together. Ionic bonding is the electrostatic attraction between positive and negative ions in an ionic crystal lattice. 3.3.1. Formation of ionic bond Activity 3.3 1) Draw diagrams to illustrate the formation of ionic compounds in sodium chloride, magnesium oxide, magnesium chloride, sodium peroxide, and sodium sulphide.