4. What Is Electrical Resistance? (Easy, Simple Definition)

Prerequisite

Before you can understand what electrical resistance is, please make sure you read my very short, easy-to-read article: What Is an Electrical Circuit?

Then, come back to EASILY understand the bare bone basics of what resistance is.

Electrical Resistance: Simple Definition

Resistance is a measure of how difficult it is for an electric current to flow through a material (like a wire).

Resistance affects the speed, strength, and duration of an electric current. The higher the resistance, the harder it is for electricity to flow.

For example, a piece of wood has a much higher electrical resistance than a copper wire. Also, a thick copper wire will have less resistance than a thin copper wire.

Every electrical load or conductor has an internal resistance, which is measured in ohms (Ω) and can be measured with a special type of electrical probe called an ohmmeter (Amazon). The higher number of ohms, the more the material has resistance.

What Causes Resistivity?

There are a few factors that affect electrical resistance.

The first is the length of the conductor. The longer the conductor, the higher the resistance will be. For example, there are more opportunities for electrons to collide as they travel down the wire.

The second factor is the diameter of the conductor. For example, a thicker wire has less resistance than a thin wire because there are fewer collisions taking place.

The third factor is the temperature of a conductor. The higher the temperature of a conductor, the higher its resistance will be.

Finally, the type of material also affects electrical resistance. Metals have low resistance, while non-metals have high resistance.

The resistance of a wire greatly depends on the material from which it is made. For example, copper wires have a lower electrical resistance than aluminum wires. This is why copper is often used for electrical wiring, while aluminum is used for things like soda cans and foil.

Applications of Electrical Resistance

One common application of electrical resistance is in heating elements. When an electric current flows through the element, it heats up and generates heat. This heat is then used to warm up something like a room or a pot of water.

Resistance is also used in electrical circuits to control the amount of current that flows through them. By adding resistance to a circuit, you can reduce the amount of current that passes through it. This can be useful for protecting electronic components from damage or for controlling how much power is drawn from a battery.

Conclusion: Electrical Resistance (Easy Definition)

In conclusion, electric resistance is a measure of how difficult it is for electricity to flow through a material. It is measured in ohms and can be increased by adding resistors (Amazon) to a circuit.

It is important to understand electric resistance when designing circuits, as it can affect the overall performance of the circuit.

Electric resistance is a measure of how difficult it is for electricity to flow through a material. The higher the resistance, the harder it is for electricity to move through the material. This is why electrical wires are made with materials that have low resistance, such as aluminum or copper, so that electricity can flow easily. Materials with high resistance, such as rubber or plastic, are often used in electrical insulation to prevent electricity from flowing where it is not supposed to.

Yame Smith, OffGridPower101.com

Next Up…

  1. What Is an Electrical Circuit?
  2. What Is an Electrical Current/Amps?
  3. What Is Voltage/Volts?
  4. What Is an Electrical Resistance?
  5. What’s the Difference Between AC and DC?
  6. What Is Power/Watts?
  7. What Is Watt-Hour & Amp-Hour?
  8. More Off-Grid Power Posts for Beginners…