Electromagnetic induction Assignment Example | Topics and Well Written Essays - 2250 words

Electromagnetic induction - Assignment Example This paper illustrates that in magnetic induction, the induced elctromotive force or emf in a closed circuit would be equivalent to the time rate of the magnetic flux passing through the circuit. Electromotive force, emf is the energy gained per unit charge that passes through an electric conductor such as a generator. Emf in any circuit is measured in Volts, and a source to give the emf is applied to power up the circuit. On the other hand, in magnetic induction, the magnetic flux will refer to the amount of magnetism or the strength of a specific magnetic field.   Two laws are important in understanding and explaining electromagnetic induction. These are the Faraday’s law and Lenz’s law. Farad’s law states that any charge passing through a magnetic field of a coil of wire will produce a voltage (emf) to be induced in the conductor. A voltage will always be produced despite the charge of the conductor or the magnetic field. The figure below summarizes Faradyâ €™a Law by explaining how voltage is generated between a conductor and a magnetic field in what is termed as magnetic induction. On the other hand, Lenz’s law is an important law that explains how magnetic induction occurs, and how flux is generated in a magnetic field. In the definition of Faraday’s law above, any emf generated by a charge in a magnetic flux will have a polarity of the induced emf in a way that produces current, with a magnetic field opposing the charge producing it.... nition of Faraday’s law above, any emf generated by a charge in a magnetic flux will have a polarity of the induced emf in a way that produces current, with a magnetic field opposing the charge producing it. Therefore, Lenz law explains that the induced magnetic field in a loop of wire will at any time act to keep the magnetic flux in the loop constant. That is; an induced field will always act in the direction of an applied field in trying to keep it constant. This experiment was aimed at demonstrating the two laws and their applicability magnetic induction. Aim The aim of the practical was to investigate the behaviors of coils and magnets in a magnetic field created by current, testing Faraday’s and Lenz’s laws, and testing the behavior of a transformer that uses the two laws above to produce electric current. Equipment provided Coils, LV transformer DC voltage source Analogue multimeter/ galvanometer Bar magnets and small compass. Safety Precautions in the Exp eriment Safety shoes were worn throughout the experiment, no damaged equipment or tool was used in the experiment, and all electric connections were ensured to have a grounding connection. In addition, before the experiment, all electrical equipment was well grounded to avoid any shaking, which could affect data collection. Procedure Two magnetic bars were placed and a compass used to trace any presence of a magnetic field and its direction at different points around the two magnetic bars as shown below. In measuring Iin In measuring inductance, an electronic bridge was used to measure the inductance of an air-core coil. The coil resistance was recorded, and the relevant dimensions of the set up measured and recorded. The following formula was then used to detect the number of turns of the coil L =