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Resistors In Series And Parallel Circuits Pdf

resistors in series and parallel circuits pdf

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There are three types of circuits: series circuits, parallel circuits, and series-parallel circuits. Part A Find the equivalent resistance of the resistor network.

Basically, a resistor limits the flow of charge in a circuit and is an ohmic device where. Most circuits have more than one resistor. The equivalent resistance of a combination of resistors depends on both their individual values and how they are connected.

Simple Parallel Circuits

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The first principle to understand about parallel circuits is that the voltage is equal across all components in the circuit. This is because there are only two sets of electrically common points in a parallel circuit, and the voltage measured between sets of common points must always be the same at any given time. Therefore, in the above circuit, the voltage across R 1 is equal to the voltage across R 2 which is equal to the voltage across R 3 which is equal to the voltage across the battery. Like a river branching into several smaller streams, the combined flow rates of all streams must equal the flow rate of the whole river. The same thing is encountered where the currents through R 1 , R 2 , and R 3 join to flow back to the negative terminal of the battery - toward point 8: the flow of current from point 7 to point 8 must equal the sum of the branch currents through R 1 , R 2 , and R 3. This is the second principle of parallel circuits: the total circuit current is equal to the sum of the individual branch currents. Please note something very important here.

Objectives :. Equipment :. A few ceramic resistors to ohms , a dc-power source, 2 multi-meters, a calculator, and a few connecting wires with alligator clips. Theory I :. A typical series circuit is shown below. Current I is the same everywhere. Figure 1.

10.3: Resistors in Series and Parallel

In the previous part we identified how the resistance of a circuit can be calculated when one or more resistors are combined in series. In this section we develop our knowledge of circuit analysis by examining parallel combination of resistors. When two or more resistors are connected between identical points in a circuit the resistors are said to be in parallel. In this situation the current has a number of different possible pathways, for example in the circuit below which represents two resistors in parallel there are two possible pathways for the current to flow. Each parallel current path is called a branch and if additional branches are added then more possible current paths are created eg. In this circuit all the connecting points along the bottom rail are equivalent to B and all the connecting points along the top rail equivalent to point A. The total current flowing iT can be calculated by using Kirchhoff's current law.

The amount of current in a series circuit is the same through any component in the circuit. This is because there is only one path for current flow in a series circuit. Because electric charge flows through conductors like marbles in a tube, the rate of flow marble speed at any point in the circuit tube at any specific point in time must be equal. From the way that the 9-volt battery is arranged, we can tell that the current in this circuit will flow in a clockwise direction, from point 1 to 2 to 3 to 4 and back to 1. However, we have one source of voltage and three resistances. We can see this concept in action in the single resistor circuit example below.

resistors in series and parallel circuits pdf

We cannot add the values of each resistor together like we can in the previous series circuit. So what do we need to do? Page 4. Calculating Total Resistance of a.


Resistors in Series and Parallel

The goal of series-parallel resistor circuit analysis is to be able to determine all voltage drops, currents, and power dissipations in a circuit. The general strategy to accomplish this goal is as follows:. This may sound like an intimidating process, but its much easier understood through example than through description. In the example circuit above, R 1 and R 2 are connected in a simple parallel arrangement, as are R 3 and R 4. Having been identified, these sections need to be converted into equivalent single resistors , and the circuit re-drawn:.

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Resistors in Series and Parallel

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5 Comments

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    07.06.2021 at 15:23
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  2. Roux D.

    08.06.2021 at 05:52
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    Most circuits have more than one resistor.

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  4. Bibiano V.

    11.06.2021 at 11:43
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    Resistors in Series and Parallel Introduction Direct current DC circuits are characterized by the quantities current, voltage and resistance.

  5. Flabvulsemi

    12.06.2021 at 15:44
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    You must be able to use Kirchoff's Rules to calculate currents and voltages in circuit components that are not simply in series or in parallel. Page 2. Resistances in.

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