Electromagnetism

To do Cable calculation it has to meet the requirements from BS 7671. Design Current First thing to do is calculate the design current. (Ib) I=Watts/Volts. You do this so you can find out the total current. Apply Diversity Factors (where applicable) Diversity is described in the onsite guide Appendix A as a way to determine the maximum demand for an installation and includes the current demand for commonly used equipment. For example if in a domestic household there were 8 lights on a…

Q. Why do wire and a compass work to detect electric currents? A. I’m going to start off with the basics here. A compass points north. Everyone knows that. Why does it point north? Well, all magnets have two “poles” or ends. One end of the magnet is called the north-seeking pole. The north-seeking pole is often abbreviated to north pole or the letter N. The north pole end of a magnet is usually colored red. The other end of a magnet is called the south-seeking pole. The south-seeking pole is…

The Physics Behind The Mousetrap Powered Car With the mousetrap auto there are a few physical science rule that are occurring as the mousetrap vehicle is in movement. These incorporate preservation of vitality, newton's laws,potential and dynamic vitality, dormancy, rubbing, and torque. The mousetrap auto has put away potential vitality and that vitality can be utilized to do work, for example, move an auto. In the mousetrap auto, the potential vitality is put away in the tensioned spring. A…

In theory, we can look at the asteroid as one giant particle with a static electric charge. As our asteroid moves rapidly through the air, it now becomes a moving charge. Once it becomes a moving charge, it should be capable of producing a magnetic field, as it produces its own current by moving through the air. The exact magnitude of the field will depend on the speed and charge of the asteroid, which will likely vary at any moment. The fragment entering the earth’s atmosphere is heated to a…

Field strength or intensity is the force which maintains the magnetic flux and produces a particular value of the flux density B at that point in a magnetic field. Therefore the flux density is the cause while the flux density (B) is the effect. The flux density can be assumed proportionally to the field intensity in a magnetic field which comes in three parts. First part is: Where U stands for the permeability of force (the measure of the degree to which the magnetic line of force can…

CHAPTER 2 2.1 ELECTROCARDIOGRAM The ECG Signal is a graphical representation of the electromechanical activity of system. The various propagation action potentials within the heart produce a current flow, which generates an electrical field that can be detected, in significantly attenuated form, at the body surface, via a differential voltage measurement system. The resulting measurement, when taken with electrodes in standardized locations, is known as the electrocardiogram. The ECG signal is…

1. Derive the mathematical expression for the Lorentz transformation equation. relative orientation of the co-ordinate systems indicated in fig.2 A light-signal, which is proceeding along the positive axis of x, is transmitted according to the equation : x - ct = 0 _______ (1). Since the same light-signal has to be transmitted relative to K1 with the velocity c, the propagation relative to the system K1 will be represented by the analogous formula x' - ct' = 0 _______(2) therefore:…

Electrical Properties AC Conductivity, Ac Resistivity, Dielectric loss, and Dielectric constant are electrical properties and measured as a function of frequency. AC Conductivity and Resistivity AC resistance (ρac) was recorded by LCR meter model 4275 in the frequency range 1MHz to 3GHz. AC conductivity was determined by using the value of Ac resistance. As we know, Ac Conductivity is reciprocal of Ac resistance can be calculated by the relation; ac =1/ρac (6) The variation of AC…

Electricity wasn’t invented it is already occurred in the nature. It was just discovered by Benjamin Franklin. His experiments (famous kite experiment) helped in building the connection between the electricity and lightning. In his experiment with kite included a kite with the key tie to the end of kite, which is connected to the Leyden jar. When the lighting struck the kite, the electric current travel down the string through the key and into the Leyden jar. We wonder that “what is there in…

Direct Current (DC) motors Name: University 1.0 Introduction A Direct Current (DC) motor is one of the broader classification of electric motors which operate from a direct current. Nearly all mechanical devices applied in daily life activities are powered by electric motors. Motors transform electrical energy to mechanical energy, hence they are essential for energy conversions in electrical machines. All types of electrical motors are made up of a stationary field referred to a stator and…