Equivalent resistance calculator series


Series Resistance Formula. The following equation is used to calculate the equivalent resistance of a set of resistors in series. R = r1 + r2 + r3 … rx. Where R is the equivalent resistance. r1,r2, etc are the individual resistances of the components in series.


What is the formula for calculating resistance?

Solve for resistance using power and current.

  • P = VI (power = voltage x current)
  • Ohm’s Law tells us that V = IR.
  • Substitute IR for V in the first formula: P = (IR)I = I 2 R.
  • Rearrange to solve for resistance: R = P / I 2.
  • In a series circuit, the current across one component is the same as the total current. This is not true for a parallel circuit.

How to calculate series resistance?

Help Calculating Resistance

  • Method 1 Method 1 of 3: Series Resistance Download Article. Series resistance is simply connecting the “out” side of one resistor to the “in” side of another in a circuit.
  • Method 2 Method 2 of 3: Parallel Resistance Download Article. …
  • Method 3 Method 3 of 3: Combined Series and Parallel Circuits Download Article. …

How do you calculate resistance in Series circuit?

③Resistance: R=R1+R2 (the total resistance in the series circuit is equal to the sum of the series resistances); if n equal-value resistors (R) are connected in series, then Rt=nR Note: The total resistance is greater than any one of the sub-resistances, because the series resistance is equivalent to increasing the length of the conductor.

What is the equation for resistance?

p= RA/l. Where p is resistivity, R is resistance, A is area of cross-section, l is length of the material. Since resistivity is proportional to resistance, it also varies with temperature in a similar fashion.


How do you find the equivalent resistance series?

SolutionThe equivalent resistance is the algebraic sum of the resistances (Equation 10.3. … The current through the circuit is the same for each resistor in a series circuit and is equal to the applied voltage divided by the equivalent resistance: I=VRS=9V90Ω=0.1A.More items…•

What is equivalent resistance calculator?

Equivalent Resistance Calculator is a free online tool that displays the sum of resistances of resistors connected in a circuit. BYJU’S online equivalent resistance calculator tool makes the calculation faster, and it displays the equivalent resistance in a fraction of seconds.

What is the rule for equivalent resistance in a series circuit?

Series Resistor Equation If two resistances or impedances in series are equal and of the same value, then the total or equivalent resistance, is equal to twice the value of one resistor.

How do you calculate total resistance in a parallel circuit?

“You can find TOTAL RESISTANCE in a Parallel circuit with the following formula: 1/Rt = 1/R1 + 1/R2 + 1/R3 + … ” Before we get into the calculations, remember what we said at the start of this section: “The total resistance of a parallel circuit is NOT equal to the sum of the resistors (like in a series circuit).

How do you calculate resistors in series and parallel?

This is shown below. To calculate the total overall resistance of a number of resistors connected in this way you add up the individual resistances. This is done using the following formula: Rtotal = R1 + R2 +R3 and so on. Example: To calculate the total resistance for these three resistors in series.

How do you find the equivalent resistance between a and B?

Solution : In (Fig. 3.22) (a), total resistance in the path `ACB`, i.e., `R_1 = 8.5 Omega + 3.5 Omega = 12 Omega`
Since `R_1 and R_2` are in parallel, the effective resistance between the points `A and B`, i.e.,
`R = (R_1 R_2)/(R_1 + R_2) = (3 xx 12)/(3 + 12) Omega = 2.4 Omega`
In (Fig.

What is the equivalent resistance when two resistors are connected in series?

Ans: If two equal resistors are connected in series, then the total resistance is given as: R + R = 2R.

What is equivalent resistance in series and parallel?

The method of calculating the circuits equivalent resistance is the same as that for any individual series or parallel circuit and hopefully we now know that resistors in series carry exactly the same current and that resistors in parallel have exactly the same voltage across them.

Is equivalent resistance the same in parallel and series?

The equivalent resistance of two resistors connected in series is the sum of the individual resistances. Figure 19: Two resistors connected in parallel. The reciprocal of the equivalent resistance of two resistances connected in parallel is the sum of the reciprocals of the individual resistances.

How do you find the equivalent resistance between two points?

The two resistances R1 and R2 of 4 ohms are in series therefore their equivalent resistance,R’ = 4 Ω + 4 Ω = 8 ΩNow the resistances R’, R3 and R4 are in parallel so the equivalent resistance of the circuit would be.Therefore the equivalent resistance between the two points A and B in the given circuit is 1.85 Ω.

What is the resistance of 2 resistors in parallel?

Two identical resistors in parallel have an equivalent resistance half the value of either resistor. The current splits equally between the two.

What is an equivalent circuit of a device?

In electrical engineering and science, an equivalent circuit refers to a theoretical circuit that retains all of the electrical characteristics of a given circuit.

What is the equivalent resistance of this parallel combination?

The equivalent or total resistance, RT of a parallel combination is found through reciprocal addition and the total resistance value will always be less than the smallest individual resistor in the combination.

How do you find the equivalent resistance of a complex circuit?

0:066:18Equivalent Resistance of a Complex Circuit with Series and Parallel …YouTubeStart of suggested clipEnd of suggested clipAnd so the expression for series resistors the equivalent resistance is just equal to the the sum ofMoreAnd so the expression for series resistors the equivalent resistance is just equal to the the sum of all of the resistors. That are in series with each.

What is resistance definition?

1 : an act or instance of opposing. 2 : the ability to withstand the force or effect of resistance to disease. 3 : an opposing or slowing force The car’s sleek design reduces wind resistance. 4 : the opposition offered by a substance to the passage through it of an electric current.

1. What is the rule for resistors in series?

If the resistors are connected in series in a circuit, then the current flows through all resistors are the same. Here, the total of all the potent…

2. What are the advantages of series resistors?

The following are the advantages of the series connection of resistors: If we connect resistors in series, then the total circuit resistance increa…

3. How to calculate the equivalent resistance in a series circuit?

When the resistors are connected in series, then its total resistance will be the sum of the resistances in the circuit. Its formula is R = R₁ + R₂…

4. What are the two main types of resistors?

The resistor is an electrical component that is having two terminals used for either limiting or regulating the electric current flow in electrical…

What is equivalent resistance?

What is Meant by the Equivalent Resistance? In Physics, an equivalent Resistance is defined as the sum of the resistance of the resistors connected in a circuit. The resistors can be connected in series or parallel. Assume that R1, R2 and R3 be the three resistors.

How to find the equivalent resistance of a resistor?

Step 1: Enter the resistance value separated by the comma, number of resistors and connection type in the respective input field. Step 2: Now click the button “Submit” to get the resistance. Step 3: Finally, the equivalent resistance will be displayed in the output field.

What is the equivalent resistance in a series circuit

Series circuit: A series circuit is a circuit where the same current flows through each of its components. (It is different from a parallel circuit where the current is divided between the different components.)

Examples of How to Calculate the Equivalent Resistance in a Series Circuit

A circuit contains three resistors with resistances of {eq}2\ \mathrm {k \Omega} {/eq}, {eq}500\ \mathrm {\Omega} {/eq} and {eq}300\ \mathrm {\Omega} {/eq} are connected in series. What is the equivalent resistance of the circuit?

Parallel and Series Resistor Calculator

Note: You can increase the number of resistors for multiple resistance connected in series or parallel.

Resistors in parallel

When two resistors share the same two nodes, they are in parallel. In this configuration, the voltage drop across each resistor is the same. The current now has several paths and can vary depending on which resistor you use. The total resistance of parallel resistors is equal to the reciprocal of each resistor’s value.

Resistors in Series

When resistors are connected in a single line, they form a series circuit. The current flowing through all of the resistors in this chain is the same. Since the current flowing through the first resistor has only one direction through the subsequent resistors in the chain, this is the case.


In conclusion, resistors in series are identical to a single resistor with a resistance equal to the number of each individual resistor’s resistance. Parallel resistors, on the other hand, produce an equal resistance that is often lower than the resistance of each individual resistor.

More Resistor Calculators

Ohms Law Calculator – to calculate resistance, current, voltage, and power.

How to find total resistance in a series circuit?

To find the total resistance in a series circuit (or a single branch of a parallel circuit), you just add up the resistances of everything in the circuit (or branch).

When are resistors in series?

Resistors are in series when there is a single current path that travels through each resistor in order.

How do resistors work in series?

Resistors in series add their values of resistance simply, making it easy to calculate their equivalent value. You can think of resistors in series as essentially functioning as a single resistor. In fact, every part of the current path through the circuit adds some amount of resistance (even wire) so that the whole circuit can be considered to be a large resistive element.

Can a circuit be a single resistor?

Even though resistors may come in complex configurations, we can model the circuit as a single resistor. This resistor will have the value of the equivalent resistance of the whole circuit.


Leave a Reply

Your email address will not be published. Required fields are marked *