Part a viva questions part b experiment part b viva questions. Resistors in series and parallel electric circuits. Resistors in series and parallel resistors in series. When resistors are connected in series, the current through each resistor is the same. Placing the resistors in parallel causes the resistance to be half that of a single resistor. A circuit is said to be in a parallel connection when the resistors are connected in such a way that they branch out from one point. Lab experiment 4 resistors in series and parallel date performed. Examination of the series circuit diagram shows the current does not branch out and therefore the currents in the three resistors are equal. Ncert class 10 science lab manual resistors in series. Construct circuits and use ammeters and voltmeters to measure resistance in series and parallel circuits. Figure 1a shows three resistors connected in series and.
Use the appropriate list of major features for series or parallel connections to solve for the unknowns. The series circuit a series circuit or series connected circuit is a circuit having just one current path. One goal of this experiment is to study circuits made up of two resistors in series or parallel. You will be building circuits similar to the ones you will be working with in homework and exam problems.
The typical resistor used here is a carbon resistor that is usually marked with colored bands to indicate its resistance in ohms, as seen in figure 1 see lab 2 for more. Parallel resistances experiment 4 oman billingual syllabus for grade 12 prepared by g. In part 1 of the experiment, we will verify this law by measuring the potential di erence across resistors in series and parallel. Adding resistors in parallel decreases the effective resistance. Combining lamps in series and parallel 10 minutes discussion. In this experiment, we will study the two simplest combinations. Then the complex combinational resistive network above comprising of ten individual resistors connected together in series and parallel combinations can be replaced with just one single equivalent resistance r eq of value 10 when solving any combinational resistor circuit that is made up of resistors in series and parallel branches, the first step we need to take is to identify the. In the last lab, you may have noticed that your experiment not the. Ohms law ii resistors in series and parallel prelab. A circuit contains battery, 2 resistors of different value, ammeter and voltmeter. Currents running through resistors in parallel, brought to you by dr clare turner and. Resistors in series two resistors are connected in series, which implies the tail of first resistor is connected to the head of second resistor. The objective of this experiment is to verify ohms law applied to a. Resistors in series and parallel formula derivation.
This experiment demonstrates how current is distributed in resistors connected in series or parallel, and thus describes how to calculate the total effective. Parallel means all the ends of the resistors are connected together at one point and all the other ends of the resistors are connected at another point. This is a very common activity performed in a electricity and magnetism. Required practical investigating series and parallel. Pages series and parallel circuits series circuits parallel circuits calculating equivalent resistances in series circuits calculating equivalent resistances in parallel circuits experiment time part 1 experiment time part 2 rules of thumb for series and parallel resistors series and parallel capacitors experiment time part 3 experiment. If two resistors r1 and r2 are connected in series, the currents passing through the two resistors are equal, and the total voltage is equal to the sum of the individual voltages across the two resistors fig. Now the resistors r6 and r7 are in series combination. When resistors are connected in parallel, the current from the source is split between all the resistors instead of being the same as was the case with series connected resistors. The outcomes of this experiment are the same using filament lamps, or combinations of resistors and. Objectives the objective of this experiment is to verify ohms law applied to a series resistors, b parallel resistors, and c a module of parallel resistors in series with another resistor equipment a few ceramic resistors 100 to 500 ohms, a dcpower source, 2 multimeters, a calculator, and a few connecting wires with alligator clips. Science practical class 10 resistance in series experiment 2.
In other words, the current is the same at all points. For one part of the lab we used two 100 ohm resistors in series and measured the following. This sort of series and parallel combination of resistors works for power ratings, too. Experiment 19 series and parallel resistances advanced reading. Resistors are in series if the same current must pass sequentially through them. When resistors are connected in series and then in parallel, the device that will show same value in both the. In part 1 of the experiment, we will verify this law by measuring the potential di erence i.
Start studying experiment 1 resistors in series and in parallel. Resistors in series and parallel resistor combinations. This is from a physics lab report on voltage and c. Let us calculate the equivalent resistance for the below circuit which consists of 7 resistors r1 4. If two resistors named as r 1 and r 2 are joined end to end they are said to be connected in series.
To calculate the voltages and currents in simple circuits involving only resistors using the rules for adding series and parallel resistors. The typical resistor used here is a carbon resistor that is usually marked with colored bands to indicate its resistance in ohms, as seen in figure 1 see lab 2 for more detail. Parallel resistors part 1 parallel resistors part 2. Resistors in series and parallel combination of networks. The equivalent overall resistance is smaller than the smallest parallel resistor. The purpose of this experiment is to learn how to use a digital multimeter to obtain measurements for voltage, current, and resistance and how to set up resistors in series and parallel connections.
Objective this lab deals with resistors configured in series as well as in parallel. In some cases when we do not get the desires or specific resistor values we have to either use variable resistors such. Resistors are in parallel if their terminals are connected to the same two nodes. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Student will learn how to calculate the resistance total resistance of an electric circuit. To examine the voltage and current flow in a series and parallel circuit of resistors. Determine the relationship between potential difference and resistance in series circuits. You can then use ohms law to determine the equivalent resistance of the two resistors.
The voltage across the battery in the circuit is equal to the voltage across each of the parallel resistors. Determine whether resistors are in series, parallel, or a combination of both series and parallel. Series and parallel circuits lab report phys 2240 studocu. In this lab we will measure and analyze currents and voltages for circuits containing a single resistor and also for two resistors in series and for two in parallel. The last experiment is about series and parallel circuits and the objectives were to determine the total current for both types of circuits, to determine the voltage and current on each resistor for both types of circuits were easily achieved by just following the procedure. Series and parallel circuits objectives to study current flow and voltages in series and parallel circuits. Also the potential differences across the three resistors should add up to. Mr habgood shows you how to measure the total resistance of resistors in series and parallel. Apparatus equipment to examine the voltage and current flow in a series and parallel circuit of resistors. Phys 1402 general physics ii experiment 4 series and. Series and parallel resistors goals to understand the fundamental difference between resistors connected in series and in parallel. You can monitor these circuits using a current probe and a differential voltage probe and see how they operate. Examine the circuit diagram to make this assessment.
There are more paths for current to flow which ensures that the current splits across the different paths the voltage is the same across the resistors. Recall from the last lab that resistance is the impedance to current flow. The resistor r 1 between a and b would be parallel with the equivalent resistance of the other two, which are essentially in series. Resistors in series and parallel connections fau studocu. The outcomes of this experiment are the same using filament lamps. This is from a physics lab report on voltage and current for resistors in series and parallel. This experiment demonstrates how current is distributed in resistors connected in series or parallel, and thus describes how to calculate the total effective resistance. Then set the maximum output current for this experiment by pressing the cc set button. Measure potential difference and current at various places in series and parallel circuits. In the video i demonstrate how to measure voltage and current in a resistor circuit where the resistors are in parallel.
Ncert class 10 science lab manual resistors in parallel. Resistors in series and parallel connections part 2. While some resistor values are labeled with text, common resistors are color coded with bands to indicate. Track the energyunit charge and the current as charge flows through batteries and resistors in series and parallel circuits. Resistors of two or more can be placed in series or paralle. Resistors are joined in the circuit in two different methods, i. Resistors in series and parallel introduction direct current dc circuits are characterized by the quantities current, voltage and resistance. Resistors in series and parallel circuits frederiksen. In this lab, you will learn how resistors in series and parallel add and how these configurations affect the current flowing in the circuit.
Ohms law iii resistors in series and parallel resistors are manufactured in many different materials, forms, shapes, values, power ratings, and tolerances. To use ohms law to calculate equivalent resistance of series and parallel circuits. Using ohms law, it possible to convert between the voltage and current through a resistance, if the resistance is known. Required practical investigating series and parallel circuits bbc. Re and r 1 are parallel, therefore the equivalent resistance is the reciprocal of. Measure the equivalent resistance of the parallel set, the currents through each resistor i 1 and i 2, the total current in the circuit and the voltage across the resistances. In our previous post about resistors, we studied about different types of resistors. Suppose a and b are the extremities of the base of the triangle. Openstax university physicsvol 2 chapter 10, section 102 equipment. To investigate the circuits to tell whether the resistors are in parallel or in series also to determine the internal resistance of a 1. Experiment 2 resistors in series and parallel connections 1 lab date 7617 report date 71117 inderjit kaur phy2049l section 8 lab instructor udeni purpose. How to measure dc voltage and current in a parallel.
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