# How do you calculate the equivalent resistance?

(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.

## What is equivalent resistance in physics?

The equivalent resistance is defined as a point where the total resistance is measured in a parallel or series circuit (in either the whole circuit or in a part of the circuit). The equivalent resistance is defined between two terminals or nodes of the network.

## How do you find the equivalent resistance in A and B?

1. So, their equivalent Resistance R′=6Ω+3Ω6Ω×3Ω
2. So, this equivalent Resistance R′′=4Ω+12Ω4Ω×12Ω
3. R′′=1648Ω=3Ω

## How do you find the 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.

## What is the equivalent resistance in A parallel circuit?

Parallel Resistor Equation If the two resistances or impedances in parallel are equal and of the same value, then the total or equivalent resistance, RT is equal to half the value of one resistor. That is equal to R/2 and for three equal resistors in parallel, R/3, etc.

## What is the purpose of the equivalent resistance?

A connection of more than one resistance together is called a combination of resistances. Equivalent resistance: If a single resistance is used instead of a combination of resistance and if the current and potential difference is not changed in the circuit.

## How do you find the equivalent resistance of A Wheatstone bridge?

In the balanced state, VB = VD, so no current will flow through the 5 Ω resistance. Now the equivalent resistance of sides AB and BC is R’ = 2 + 3 = 5 Ω. If the equivalent resistance between the points A and C is R, then. Question 3: The electric circuit of a balanced Wheatstone bridge is shown in Figure.

## What is the equivalent resistance of this 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. The following two problems demonstrate how to calculate equivalent resistance in a parallel circuit.

## How do you find the equivalent resistance of a Class 12?

The equivalent resistance of a number of resistors connected in parallel can be computed using the reciprocal of the resistance i.e. \frac1 R. The reciprocal of the equivalent resistance will be equal to the sum of the reciprocals of each resistance. The unit of resistance is the Ohm i.e. \Omega.

## What is the equivalent resistance between A and H?

Final Answer:Equivalent resistance of the network is 5/6 kilo ohm.

⟹ RPQ=1Ω

## What is the equivalent resistance of two resistors in parallel?

Two identical resistors in parallel have an equivalent resistance half the value of either resistor.

## Why is equivalent resistance less in parallel?

In parallel combination of resistors, the effective area of cross-section of the conductor increases, to the resistance decreases.

## What is the equivalent resistance for a series circuit with three resistors?

Since there is only one path for the charges to flow through, the current is the same through each resistor. The equivalent resistance of a set of resistors in a series connection is equal to the algebraic sum of the individual resistances. Figure 6.2. 2 (a) Three resistors connected in series to a voltage source.

## What is equivalent resistance Easy?

The equivalent resistance of a network is that single resistor that could replace the entire network in such a way that for a certain applied voltage V you get the same current I as you were getting for a network.

## How can you tell if A circuit is series or parallel?

How do I identify which ones are parallel or series? If all of the current leaving one resistor enters another resistor, the two resistors are in series. If all of the voltage across one resistor is across another resistor, the two resistors are in parallel.

## How do you calculate resistance in 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.

## What is Wheatstone bridge formula?

Wheatstone Bridge Formula Following is the formula used for the Wheatstone bridge: R = P S Q. Where, R is the unknown resistance. S is the standard arm of the bridge.

## How do you calculate Wheatstone resistance?

1. R1 / R2 = R3 / R. X
2. RX = (9 Ω / 6 Ω) * 4 Ω
3. RX = 6 Ω