Wednesday, November 24, 2021

Resistors : Series and Parallel

A resistance or resistor is an electronic or electrical component whose main characteristic is to oppose a greater or lesser resistance (measured in ohms) to the flow of electric current.

It is by metonymy that the word "resistance", which designates above all a physical property, has come to designate also a type of component that some prefer to call a "resistant dipole". We also use, for the teaching of physics, the term “resistor” or the anglicism “resistor” (from the word resistor which, in English, designates this type of component), or the expression “ohmic conductor”, so as to avoid using the same term for the object and its characteristic.

Equivalent resistance is a modeling tool used in the field of electricity. This consists in replacing in a part of the circuit a set of resistors by a single one which must be equivalent for the rest of the circuit, in order to simplify the study of the circuit.

To determine this unique resistance, we usually rely on two relations which allow us to calculate the equivalent resistance for the two elementary associations:

in series, that is to say crossed by the same intensity;
in parallel or in shunt, that is to say having the same voltage at their terminals.

Resistors : Series and Parallel

A resistance or resistor is an electronic or electrical component whose main characteristic is to oppose a greater or lesser resistance (measured in ohms) to the flow of electric current.

It is by metonymy that the word "resistance", which designates above all a physical property, has come to designate also a type of component that some prefer to call a "resistant dipole". We also use, for the teaching of physics, the term “resistor” or the anglicism “resistor” (from the word resistor which, in English, designates this type of component), or the expression “ohmic conductor”, so as to avoid using the same term for the object and its characteristic.

Equivalent resistance is a modeling tool used in the field of electricity. This consists in replacing in a part of the circuit a set of resistors by a single one which must be equivalent for the rest of the circuit, in order to simplify the study of the circuit.

To determine this unique resistance, we usually rely on two relations which allow us to calculate the equivalent resistance for the two elementary associations:

in series, that is to say crossed by the same intensity;
in parallel or in shunt, that is to say having the same voltage at their terminals.