Factors That Affect Resistance and Electric Power

Factors That Affect Resistance and galvanic car PowerA report into the galvanizingity practical investigation and problemsSamerah Mansha diddleThis taste was regarding electricity and its features. The investigate determines factors that affect immunity and electric power. The results destineed that by increasing the deed of bulbs inside the electric roachs affected both electric power and electric resistance valuate in both series and collimate licks.IntroductionThe scope of the investigation was to find out the factors that affect resistance inside a lap covering by constructing series and par on the wholeel forget me drugs whilst varying the get of bulbs used. Additionally, a voltmeter was connected within to sum the electric capableness unlikeness difference in volts between two points within the dress circle. An ammeter was also used to measure the legitimate in amps within the circuit. require authentic is known as the continuous movement of electrons fr om atomic upshot 18as surrounded with veto charge to areas surrounded with positive charges by dint of a conducting material much(prenominal) as metal wire. Whilst the intensity of up-to-date can vary the superior general direction of movement be the same throughout. A common modeling of a direct current is a battery.Parallel circuits and series circuits are two basic types of electric circuits that can be found within electrical devices. They both differ in terms of where the comp unmatchablents are determined within circuitIn series circuits there are no branches present thus components are connected one after other in a single path way of life, allowing current to follow the circuit from one side to the other side of cellular phone passing through all(prenominal) of the components, one after the other. In a series circuit, if a lamp breaks or even a component is disconnected, the circuit is broken ca development all the components within to stop working. The current found in series circuit is found to be the same anywhere within the circuit, whilst the voltage is divided in ratio to resistance.Figure 1 an casing of series circuit.In a jibe circuit, there are multiple pathways between circuits beginning and end, whilst different components are connected into different branches of the wire.thusly the electric current has more than one route to take, thus circuit has the potential to still function even if one path fails, for example if a lamp breaks or a component is disconnected from one parallel wire, the components on different branches are still able to work indeed parallel circuits are more commonly used in mansion applications. Regardless of how many different paths the circuit has, the total voltage stays the same, as the voltage across each pathway equals to the supply voltage. The current through parallel circuits splits up as it passes through the passageways.Figure 2 an example of a parallel circuitElectromotive force abbreviate d as e.m.f is when charge flows through a cell or battery, it is given zipper.The number of joules of efficacy given to each coulomb of charge that passes through the cell is known as called e.m.f. of cell and is measured in volts (V). It is equal to the potential difference across the terminals of the cell when no current is slick. Examples of sources of e.m.f are cells, batteries and germ potential difference (p.d) is known as the amount of electrical energy that is changed into other forms of energy per coulomb of charge. In circuits there are components that draw energyinto the circuit and components that take energyout. Any device putting energy into circuit is providing an e.m.f whilst any device taking energy out has p.dacross it.The p.d across an electrical component is needed to make current flow in it. Cells or batteries usually are responsible for the p.d needed. P.d is measured in volts using a voltmeter. voltaical cells are made from materials and chemicals, which deem some sort of resistance. Therefore, a batteries and cells must have resistance known asinternal resistance which ismeasured in ohms. When electricity flows round a circuit the internal resistance of the cell itself causes a drop in soruice of voltage whilst resisting the flow of current thusthermalenergy is wasted in the cell itself.Ohms law of nature is commonly used to portray that current flowing through a metal wire is proportional to the potential difference across it, providing that temperature stay constant.Resistance is measured in ohms.rthus greater the number of ohms, the greater the resistance.The relationship between voltage, current and resistance is V= IR, Potential difference (volt, V) = current (ampere, A) resistance (ohm,).Figure 3 Graph viewing the relationship between current and voltage following Ohms Law that electric current is proportional to voltage and inversely proportional to resistance Electric power is the rate of energy consumption and the wa y electric energy is transferred n within an electrical circuit. The electric power is measured in watts.PlanningEquipmentLocktronics electricity outfitBulbsAmmeterVoltmeterWiresElectric SourceSafety MeasuresAs the mains voltage electricity was used throughout the experiment, it was dangerous. Thus significant happen of electrocution whitethorn occur if mains voltage electricity is allowed to pass through the body. The mains voltage was made sure it was switched of when connecting wires and components together. There could be a jeopardize of fire and explosion if electricity is not cabled and fused correctly and if proficient water. Therefore precautions were taken when mains electricity was. Before any equipment was used they were examine to see any visible damage to the leads and equipment.MethodFirstly a simple series circuit was conducted out using an locktronics electricity kit is which simplifies the process of learning electricity using wires, mains source, voltmeter, amm eter and one light bulb.Secondly, 3 other simple series were conducted out in the same way each increasing the amount of light bulbs used.Lastly, 3 apparel circuits were constructed using the same rule as above each increasing the amount of bulbs used within.In each of the series and parallel circuits, the voltage and current was measured.Using the measurements of voltage and current, the values of resistance and electrical power was calculated.Results exit figures 5,6,and 7The results for the series circuits show that as the number of bulbs development, the value current and voltage decrease. Apart from 3 bulbs for series circuit the value of amperes should be less as it doesnt fit in with the general trend.Whereas the in the parallel circuits as the number of bulbs increase the current decrease, whilst the voltage remains the same.AnalysisThe values of resistance and electrical power have been calculated. (see figure).The findings show that for the series circuits show that as t he number of bulbs increases the value of power and resistance both decrease. However, when there were 3 and 4 bulbs within the circuit the value of resistance remained the same within the circuit which doesnt fit in with the general trend, therefore figure 3 or 4 may be an unusual person.The calculations show for the parallel circuits show that as the number of bulbs increase the value of electrical power increases, whilst the value of resistance decreases.This graph shows that ohms law has been obeyed as the current flowing through is quiet proportional to the potential difference across.EvaluationThere may have been one anomaly that was recorded within the series circuits between the 3 and 4 bulbs experiment as the current should have decreased but stayed the same. However this could have been because a needle ammeter was used, therefore is subject to ones thought process thus not entirely accurate, in order to meliorate this a digital ammeter could have been used to improve r eliability.Also the ammeter scale couldnt be accurately read as there was no stones throw between the 1 and 2 values.In order to improve the method more number of bulbs could have been used to show more of an overall trend which would improve validity and reliability of conclusion. In order to improve the reliability and validity of the method a repeat should be conducted of the experiment to achieve average results. Overall, the results match theory thus portraying the results achieved are reliable.