How do you find the equivalent resistance of a circuit?

The equivalent resistance of a 4-Ω and 12-Ω resistor placed in parallel can be determined using the usual formula for equivalent resistance of parallel branches: 1 / Req = 1 / R1 + 1 / R2 + 1 / R3 Now the Ohm’s law equation (ΔV = I • R) can be used to determine the total current in the circuit.

What is the equivalent resistor of the circuit?

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.

What is equivalent resistance in a parallel circuit?

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 resistance formula?

Resistance has units of ohms (Ω), related to volts and amperes by 1 Ω = 1 V/A. There is a voltage or IR drop across a resistor, caused by the current flowing through it, given by V = IR.

How do you find equivalent resistance?

Equivalent resistance can be found if you know the individual resistance values and the source voltage. By calculating each branch current, adding the branch currents to calculate total current, and dividing the source voltage by the total current, the total can be found.

How do you calculate resistance in a circuit?

It is defined as the resistance in a circuit with a current of 1 ampere at 1 volt. Resistance can be calculated using Ohm’s law, which states that resistance equals voltage divided by current, or R = V/I (more commonly written as V = IR), where R is resistance, V is voltage and I is current.

What is the equivalent resistance in a parallel circuit?

The equivalent resistance of a parallel circuit is found by the general equation Req = 1 / ( 1/R1 + 1/R2 + … 1/Rn) The total power consumed in a parallel circuit is equal to the sum of the power consumed by the individual resistors.

How do you calculate voltage across a resistor?

To calculate the voltage drop across a resistor, remember: Ohm’s Law (V=I*R) is your friend. Find the current flowing through a resistor, then multiply the current in amps by resistance in ohms to find the voltage drop in volts.