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Physics Assignment- Electricity

   

Added on  2020-05-28

5 Pages1094 Words68 Views
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Unit: Electricity1.2a)Electric current flows through the electric wires and it is measures in Amps. Electric current is simply flow of electrons in substances which allow the flow (Weedy 2012). Therefore the 8 -10A in the electric kettle is the measure of current flow, which the kettle candraw to heat what is in the kettle. Current movement is caused by movement of electrons, which are pulled by an electric field. These electrons bump into atoms of the wires as they move through. The electrons are always moving in the opposite direction of the current (Cooper 2015). When the electrons and atoms bump up, they transfer kinetic energy. The electrons are always in motion while the atoms are stagnant therefore; the electrons usually transfer kinetic energy to the atoms. The heating up in the element is therefore caused by the kinetic energy transfer. The kinetic energy transfer is therefore able to form the heating up. The current indicator in the kettle is the amount of electric current flow which can be allowedto move within the element (El-Sharkawi 2000). From Ohms law, it is clear that the heating isproportional to the resistance. The resistivity is the resistance which the current experiences when it is moving through the elements. Since the number of electrons is related to the current induced, the resistivity is therefore able to increase with increase of the current introduced in the elements. Increasing resistivity increases the speed of electrons and therefore increasing the collisions. This means a lot of kinetic energy is transferred and therefore causing more heating up of the elements when current is switched on (Kanopy 2014). The kinetic energy is inform of heat and is usually transfer to elements being heated up and therefore increasing the element in the kettle.

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