Ohm’s law & resistors in parallel & in series Essay

ObjectivesOur object is to confirm Ohms justice by analyzing the dependence of the electrical present-day(prenominal) as a function of potency and as a function of enemy. Also, we studied the watercourse flow and potency in serial and parallel. Finally, the science research lab determined the equation bulwark of series and parallel combination of resistors and compared the results with theoretical data.Theoretical scopeThe first thing that needs to be described in this lab is what the electric underway I I =. The electric current is delimit as drag down over time and the unit is ampere (A). In a case where we have the voltage, resistance and current we can machinate the equation for resistance to be R = where the unit is called Ohm (). The current by dint of a resistor is directly proportional to the utilise voltage V and inversely proportional to the resistance (College Physics Laboratory Experiments, 43) in our lab experiment we used close to machinery to produ ce and to measure voltage and some current. We were then able to come on its resistance. These apparatus are called ammeter which displays the amount of current in circuit, and the voltmeter to read the voltage (potential difference). Reminding that this diagram is named circuit and V is applied across the ends of the metallic conductors.The second part of our lab was dedicated to find the resistance in the resistors both in parallel and in series. The verbalism to find the resistance with series is fairly easy it looks a lot corresponding the formula in series for conductors. Its basically RA+RB+RC = Req. When it comes to find the totalresistance when the resistors are in parallel we add the reciprocal of the combination of resistors. It will look like this + + =ProcedurePart 1 Verification of Ohms Law1 Investigate the variation of the current with potential difference when the resistance is constant. a Set up the circuit as shown in Fig 4.2 and chose the resistance of the var iable resistor rap of R = 1000 . Set the ammeter to the aim of mA and the voltmeter across the resistor the range of 25V. b After the teacher has checked the circuits, turn on the power supply. c Vary the turnout voltage of the power supply from 4 V to 10 V in the increment of 1 V and record the readings of the voltage V across the resistor and the corresponding current I through the resistor in Table 1. d Using the same circuit sort outup, set resistance of the variable resistor box to R = 1200 and repeat the travel 2 and 3. 2 Investigate the variation of the current with resistance when the voltage is constant. a Use the same circuit setup and set the turnout voltage of power supply to 12V. b By keeping the outturn voltage of the power supply constant, vary the resistance of the resistor box from 700 to 1700 in increments of 200 . Record values of the current I through the resistor and the corresponding resistance R in table2.Data given to report.Calculations1 Use the dat a from table 1 to plot a graph of current Vs. voltage for both values of the resistance. Determine the slope of the graph. From the slope of the graph find the resistance using a) R = R = R =1000 % diff = = 0%b) R = R = R =1250 c) deliver = 12.7V = 12 vQuestions1. Does your resistance come after Ohms law? Base your answer on your experimental data. The resistance does closely follow Ohms law because when using the data mathematically it is closely tie in to the resistance present in the data.2. A typical color goggle box draws about 2.5 A when connected a 120V source. What is the effective resistance of the TV set? I = , R = = = 48 3. Explain the difference in the midst of series and parallel connections. In a series circuit the excite is 1/Q + 2/Q + while in a parallel connection, the charge is added to the total voltage.4. Does your experiment present evidence that the current divides in a parallel circuit?No.5. From your experimental observations of a series circuit, what blood do you find between the voltages across the individual resistance and voltage across the entire series group? The voltage in a series compared to parallel is much lower6. From your experimental observations of a series circuit, what relationship do you find between the voltages across the individual resistance and current flow across the entire series network?The resistance is constant.7.ConclusionOur results for both parts of this lab demonstrated the relationship outlined by Ohms Law and fostered a higher comprehension of the mechanisms tearaway(a) circuit behavior. The direct relationships between voltage, current, and resistance allow measurements of the voltage and current without resistance being known. Additionally, the ability to manipulate voltage allowed the experiment to have got a sense of systematic collection of data to provide a contextual experimental example of the relationships in Ohms law. Moreover, the experiment to a fault demonstrated how the differen t are configurations of resistors, parallel.