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How does the total resistance in a system change when additional resistance is added in series?
Sneighke answered: This discussion adds to the original question There are two types of resistance topologies: 1) Series and 2) parallel. To answer your question, resistance added in series always ADD together increasing the total resistance of the circuit. Conversely, adding parallel resistance reduces the total resistance of the circuit. So, for series circuits, R(total) = R1+R2+...Rx Parallel circuits are the exact mathematical inverse. The easiest way to determine parallel resistance is to add the inverse of resistance which is conductance, conductance being 1/r and is stated in Siemens (hold the jokes!...), then taking the inverse of the total conductance to convert back into Ohms. For example, if you have three resistors R1, R2, and R3, and they are parallel connected, the total resistance of the circuit is the inverse of the sum of conductance which would be written as 1 / (1/r1+1/r2+1/r3). By definition, conductance is the inverse of resistance. An example: Given three resistors of 5, 100, and 500 Ohms, In series, R(total) = 5+100+500 = 605 Ohms. In parallel, the total is always less than the lowest resistor: Converting to conductance (used to be called Mhos which is "Ohm" backwards, but has been replaced with the SI unit of Siemens): 5, 100, and 500 Ohms = 1/5+1/100+1/500 = 0.200+0.010+0.002 = 0.212 Siemens. Converting back into resistance, 1/conductance = 1/0.212 Siemens = 4.717 Ohms which as stated above, is less than the lowest resistance resistor. In fact, sometimes working with conductance is easier in series/parallel circuits and, in particular, calculating which values of resistors are required to yield a desired resistance; usually a non-standard resistance value needed for a specific purpose in a circuit. An example: Say you need a non-standard resistance of 698 Ohms. Since we know that parallel resistors create a value lower than the lowest parallel connected resistor, you would start with the next highest standard value and then add a parallel resistor to get you what you need. In this case, you would subtract the desired conductance from the starting resistor: 698 Ohms = 1/698 = 0.001427 Siemens or 1.4327 milliSiemens. If we had a standard value resistor of 750 Ohms (remember, you have to start higher): 750 Ohms = 1.3333 mS. To find the required parallel resistor to get us our 698 Ohms, subtracting the conductances 1.4327mS-1.333mS = 99.33uS (micro Siemens) [0.00009933 S]. Converting back into Ohms, 1/99.33uS = 10.07kOhms (10,070 Ohms) which is close to the standard value of 10kOhms. Doublechecking, Add the conductances: 10,000 Ohms = 100uS 750 Ohms = 1.3333mS Adding gives a total conductance of 1.4333mS. Thus the parallel equivalent = 1/Siemens = 1/0.0014333 = 697.7 Ohms which is within 0.04% of the 698 Ohms we need which is well within acceptable error and we have our 698 Ohm resistor by connecting 10,000 Ohms and 750 Ohms in parallel.
What else can I help you with?
A 3 ohm 2 ohm and a 5 ohm resistor are in series What is the total resistance in ohms of the system?
10 Ohms.
What type of system does potentiometer belong to?
Variable resistance.
Is the total resistance of all the parallel loads more than the smallest individual resistance?
No. Perhaps an analogy would help understand the answer to this question. When you are at the store, and you are in a line waiting to be paid, opening up another line or more should increase how fast people can move through the store. That is a parallel operation. (If you have to go through one line at the store and then go through another line at the store, that is a series operation). Similarly, when a current meets a resistance, putting additional resistance in PARALLEL allows some of the current to divert to this new path or paths, allowing more current to flow through the combination of resistances. Since more current is flowing though the combined resistances, the equivalent resistance is less since less resistance always means more flow.
Can a 4 ohm cabinet be changed to 8 ohm?
Its not recommended. A four ohm speaker cabinet can be changed into an eight ohm speaker cabinet, if you have enough speakers in the cabinet in parallel that can be rewired in series. Unless you have a high end cabinet, the likelihood of this is small.Two four ohm cabinets, however, in series will be eight ohms. Keep in mind, however, that doubling the resistance will halve the current, which will quarter the power. Also, changing the impedance of a speaker system will change the frequency response, because often the filters are tuned with resistors.
How do you measure the resistance of a resistor with an ammeter and a voltmeter?
If all you have is a voltmeter, then resistance can only be calculated. If you know the total volts applied and current, either total current if in series ckt or current through the component if parallel type ckt, then the following formulas apply: R=Eapp÷It (series ckt) R=Eapp÷IR (parallel ckt)
A 3 ohm 2 ohm and a 5 ohm resistor are in series What is the total resistance in ohms of the system?
10 Ohms.
What is the effective spring constant of two springs in series and how does it affect the overall system's behavior?
When two springs are connected in series, the effective spring constant is calculated by adding the reciprocals of the individual spring constants. This results in a higher overall spring constant, making the system stiffer and harder to stretch or compress. This means that the overall system will have a higher resistance to deformation and will require more force to change its shape.
Under what circumstances is momentum not conserved?
Momentum is not conserved when external forces act on a system, such as friction or air resistance, causing a change in the total momentum of the system.
What is system resistance?
The resistance the heart has to pump against
What is the main function of resistances in fire alarm circuit?
Heat changes the resistance of a circuit. The change is detected by the system, and activates the alarm.
What is the total voltage drop across a set of resistors in series?
Simply add all of the component's resistances together and that will give you circuits total resistance. If you're dealing with a 'series-parallel', or 'parallel' circuit, the equations will change, but in a simple series circuit, the total resistance is just the total of all the component's resistance.
What will happen to a buzzer connected to a circuit?
If it is connected in series with a circuit then it might raise the resistance too high and fail the system. Parallel connection is a circuit is probably the best bet you have.
What does a derailleur do in a bicycle's gear system?
A derailleur is a device in a bicycle's gear system that moves the chain between different gears on the cassette or chainrings, allowing the rider to change the resistance and speed of pedaling.
The natural resistance to disease is from what system in your body?
the immune system
What does the power vs resistance graph illustrate and how can it be used to analyze the relationship between power and resistance in a system?
The power vs resistance graph illustrates how power output changes with varying levels of resistance in a system. It can be used to analyze the relationship between power and resistance by showing how power increases as resistance decreases, and vice versa. This graph helps in understanding how changes in resistance impact the power output of a system.
P 1320 Toyota sequoia?
Ignition system fault-sometimes this code will come up when a coil goes out or after a plug change if resistance on the plugs is wrong
What should be the earth resistance of a good earth?
The lower the resistance you get in the grounding/earth system the better. In offshore a resistance from 1-2 ohm is a good earthing system. In Onshore a miximum of 10ohm is acceptable.
