9.3 Resistance

• Filament: In electrical terms, a filament refers to a thin wire, typically made of tungsten, used in incandescent light bulbs and certain heating elements. When electricity passes through the filament, it heats up and emits light or heat, depending on its purpose.
• Ohms: Ohms is the unit of measurement for electrical resistance, symbolized by the Greek letter omega (Ω). It quantifies how much a material or device impedes the flow of electric current. One ohm is the amount of resistance that restricts the flow of one ampere of current when subjected to one volt of potential difference.
• Ohm’s Law: Ohm's Law is a fundamental principle in electrical engineering and physics that describes the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit. It states that the current passing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance. Mathematically, it is represented as V = I * R.
• Resistor: A resistor is an electrical component designed to introduce resistance into an electrical circuit. It is typically constructed from materials with high resistance properties and is used to control the flow of electric current, reduce voltage levels, or divide voltage in a circuit. Resistors are characterized by their resistance value, measured in ohms, and power rating, indicating the maximum amount of power they can dissipate without damage.
• Resistance: Resistance refers to the opposition offered by a material or device to the flow of electric current. It is determined by the material's properties, such as its composition, dimensions, and temperature. Resistance is measured in ohms (Ω), and materials with high resistance impede the flow of current more effectively than those with low resistance.
• Resistance is a measure of how easy or diffi cult it is for electrons to move through a material. Conductors, such as copper, have very low resistance. Insulators, such as most plastics, have very high resistance.

  Resistance is measured in units called ohms. Ohms have the symbol

  which is the Greek letter omega.
• Resistance slows the flow of electrons, so lowers current
• The greater the resistance in a circuit, the smaller the current

  in the circuit
• Resistance, measured in ohms (Ω), quantifies how difficult it is for electrons to move through a material. Conductors like copper have low resistance, while insulators like plastics have high resistance. Resistance slows electron flow, reducing current.
• Ohm's law, discovered by Georg Simon Ohm, relates voltage (V), current (I), and resistance (R) in a circuit, expressed as V = I * R. In this equation, V represents voltage in volts, I represents current in amps, and R represents resistance in ohms. Ohm's law is fundamental in understanding electrical circuits and applies to various components beyond wires.
• A resistor is a type of electrical component designed to have a

  known resistance.
• Resistance is measured in ohms (Ω) and quantifies how difficult it is for electrons to move through a material
• Conductors like copper have low resistance
• Insulators like plastics have high resistance
• Resistance slows electron flow, reducing current
• Ohm's law relates voltage (V), current (I), and resistance (R) in a circuit, expressed as V = I * R
• In Ohm's law, V represents voltage in volts, I represents current in amps, and R represents resistance in ohms
• Ohm's law is fundamental in understanding electrical circuits
• Ohm's law applies to various components beyond wires