Physique et Chimie - Association des conducteurs ohmiques

Vocabulary flashcards based on the lecture notes on ohmic conductors.

Ohmic Conductor

A passive dipole characterized by its resistance.

Resistance (R)

The physical quantity that characterizes an ohmic conductor's ability to slow down the passage of current; measured in ohms (Ω).

Ohm's Law

The relationship stating that the voltage (U) across an ohmic conductor is proportional to the current (I) flowing through it: U = R * I.

Resistivity (ρ)

A property of a material that determines its resistance; measured in ohm-meters (Ω⋅m).

Conductance (G)

The measure of how well a conductor allows current to flow; it is the inverse of resistance (G = 1/R) and measured in siemens (S).

Color Code (Resistors)

A method of determining the resistance value of a resistor using colored bands.

Series Association

Resistors connected end-to-end, so the same current flows through each; the total resistance is the sum of individual resistances.

Parallel Association (Derivation)

Resistors connected side-by-side, so the voltage across each is the same; the reciprocal of the total resistance is the sum of the reciprocals of individual resistances.

Voltage Divider

A circuit configuration using resistors to produce a variable voltage from a fixed voltage source.

Rheostat

A variable resistor with three terminals used to create a voltage divider.