Equivalent Resistance Definition

Equivalent resistance: If a single resistance can replace the combination of resistances in such a manner that the current in the circuit remains unchanged, then that single resistance is called the equivalent resistance.

What is equivalent resistance in a 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.

What is the equivalent resistance of the resistors?

Thus equivalent resistance of the resistors connected in series is always equal to the sum of component resistors.

What is equivalent resistance formula?

The equivalent resistance is the algebraic sum of the resistances (Equation 10.3. 2): RS=R1+R2+R3+R4+R5=20Ω+20Ω+20Ω+20Ω+10Ω=90Ω. 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.

What is equivalent resistance in 12th physics?

Equivalent resistance for the resistors connected in series is given by simply adding the values of resistance R=R1+R2+… Equivalent resistance for the resistors connected in parallel is given by adding the reciprocals of resistances 1R=1R1+1R2+…

Why is equivalent resistance less in parallel?

In a parallel circuit, the net resistance decreases as more components are added, because there are more paths for the current to pass through. The two resistors have the same potential difference across them.

How do you find equivalent resistance in parallel?

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 equivalent resistance between two points?

One trick that is used is to place a current source across the two nodes you need to know the resistance between, then solve for the voltage across those two nodes, then R=V/I.

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.

Is effective resistance and equivalent resistance the same?

What is the difference between Equivalent Resistance and Effective Resistance? Equivalent resistance is a purely resistive property, which does not change with any other variable. Effective resistance is another name given to the impedance. Impedance is a property, which changes with the frequency of the signal.

How do you find the equivalent resistance in a combination circuit?

So i go 3 ohms plus 5 ohms plus 7 ohms to get 15 ohms is my total equivalent resistance. For any

What is Main Line current?

Mains electricity or utility power, power grid, domestic power, and wall power, or in some parts of Canada as hydro, is a general-purpose alternating-current (AC) electric power supply. It is the form of electrical power that is delivered to homes and businesses through the electric grid in many parts of the world.

How do you find the equivalent resistance of a circle?

Rt = R (t)otal.

What is series and parallel connection?

The basic idea of a “series” connection is that components are connected end-to-end in a line to form a single path for electrons to flow: The basic idea of a “parallel” connection, on the other hand, is that all components are connected across each other's leads.

What is Ohm's law class 12 Ncert?

It states that the voltage or potential difference between two points is directly proportional to the current passing through the resistance and inversely proportional to the resistance of the circuit. The formula for Ohm's Law is V=IR.

What is current formula?

Ohm's law relates the current flowing through a conductor to the voltage V and resistance R; that is, V = IR. An alternative statement of Ohm's law is I = V/R.

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

Since, 2/3 = 4/6, this is the circuit of a balanced 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.

Why is voltage same in parallel?

The first principle to understand about parallel circuits is that the voltage is equal across each parallel component. 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.

Why does current increase in parallel?

Adding more parallel resistances to the paths causes the total resistance in the circuit to decrease. As you add more and more branches to the circuit the total current will increase because Ohm's Law states that the lower the resistance, the higher the current.

Why is resistance different in series and parallel?

In a parallel circuit, the overall resistance will always be less than any individual circuit. Whereas in a series circuit overall resistance will always be more than any individual resistor. In a parallel circuit total resistance is not equal to the sum of the total number of resistors like in a series circuit.