How to find the equivalent resistance of a circuit


Equivalent Resistance of a circuit is obtained by calculating parallel and series elements in a circuit. A circuit may contain many series and parallel connected elements.

(d) Using Ohm’s law (V2=I2R2), the power dissipated by the resistor can also be found using P2=I22R2=V22R2. To find the equivalent resistance of the circuit, notice that the parallel connection of R2 and R3 is in series with R1, so the equivalent resistance is Req=R1+(1R2+1R3)−1=1.00Ω+(16.00Ω+113.00Ω)−1=5.10Ω.Feb 20, 2022


What is the equivalent resistance through the entire circuit?

Equivalent Resistance, often abbreviated as R eq in electrical engineering, is a measure of whole combined resistance of 2 or more resistors connected in series or parallel. A resistor is a two terminal electrical component that creates the resistance for the passage of current flow. The measurement unit for resistance is Ohms (Ω).

How could you calculate the resistance of a circuit?

To calculate the resistance of an electrical component, an ammeter is used to measure the current and a voltmeter to measure the potential difference. The resistance can then be calculated using Ohm’s Law.

What is the effective resistance of the given circuit?

The effective resistance of a circuit between two nodes is the resistance offered by it when a battery is connected across these nodes. If V is the battery voltage and I is the current through it then R e = V / I. If you have a physical circuit then you can measure it. Also, you can calculate the effective resistance by using Kirchhoff’s laws.

How is the resistance of a circuit calculated?

Method 2 Method 2 of 4: Parallel Circuit

  1. Understand parallel circuits. A parallel circuit branches into multiple paths, which then join back together.
  2. Calculate the total resistance from the resistance of each branch. …
  3. Begin with total current and voltage instead. …
  4. Use these values in Ohm’s Law. …
  5. Watch out for branches with zero resistance. …

What is the equivalent resistance of the circuit?

The equivalent resistance is where the aggregate resistance connected either in parallel or series is calculated. Essentially, the circuit is designed either in Series or Parallel. Electrical resistance shows how much energy one needs when you move the charges/current through your devices.

How do you find equivalent circuits?

For a parallel circuit with three resistors, the voltage drop across each resistor equals the supply voltage. In other words, for a parallel circuit, the equivalent resistance is found by adding the reciprocals of the individual resistance values, and then taking the reciprocal of the total.

How do you find equivalent resistance in a parallel circuit?

How do you calculate two resistors in parallel? Take their reciprocal values, add the two together and take the reciprocal again. For example, if one resistor is 2 Ω and the other is 4 Ω, then the calculation to find the equivalent resistance is 1 / (1/2 + 1/4) = 1 / (3/4) = 4/3 = 1.33.

How do you find the resistance of a circuit?

If you know the total current and the voltage across the whole circuit, you can find the total resistance using Ohm’s Law: R = V / I. For example, a parallel circuit has a voltage of 9 volts and total current of 3 amps. The total resistance RT = 9 volts / 3 amps = 3 Ω.

How do you solve equivalent resistance problems?

Find equivalent resistance of the network. Find current in each resistor. Find voltage drops VAB,VBC,VCD. Medium.

What is the equivalent resistance between a and B?

Therefore, equivalent Resistance between A and B is 5Ω

How do you know if two circuits are equivalent?

Two circuits are equivalent if you provide a certain voltage to the terminals the current through the terminals will be the same and and vice versa; i.e. if you let flow a certain current through the terminals, the voltage across the terminals will be the same for both circuits.

What is equivalent circuit?

Definition of equivalent circuit : an electric circuit made up of the basic elements resistance, inductance, and capacitance in a simple arrangement such that its performance would duplicate that of a more complicated circuit or network.

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.

Which of the following circuits are equivalent?

The correct answer is option 1. H= ab+bc+ca. F, G, and H produce the same output for all inputs. Hence the correct answer is F, G, and H.

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?

What is Equivalent Resistance in a Parallel Circuit?

Equivalent Resistance: The equivalent resistance of a circuit is the total electrical resistance caused by all of the resistors in the circuit acting together against the voltage source.

How many resistors are there?

There are three resistors, their resistances are 1,000 ohms, 200 ohms, and 500 ohms.

How many ohms are in a parallel resistor?

Three resistors in parallel have resistances of 1,000 ohms, 200 ohms, and 500 ohms. What is equivalent resistance in the circuit?

How many resistors are parallel?

Four resistors are in parallel, the resistance of the resistors are as follows: 10 ohms, 5 ohms, 2 ohms, and 1 ohm. What is the equivalent resistance of the parallel 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 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.


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