Understanding Electrical Resistance

Understanding Electrical Resistance

Read each question carefully and answer to the best of your ability. Some questions may require you to think about how electricity works.

What is Resistance?

Electrical resistance is a measure of how much an object opposes the flow of electric current. Think of it like friction for electricity. Materials that have high resistance slow down the flow of electricity, while materials with low resistance allow electricity to flow easily.

1. Which of the following best describes electrical resistance?

2. Materials with high resistance are called:

3. Electrical resistance is like   for electricity.

4. A material that allows electricity to flow easily has   resistance.

5. A common electronic component designed to add resistance to a circuit is called a  .

6. Copper wires have high resistance, which is why they are used in electrical circuits.

7. Look at the image below. This is an electrical resistor. What do you think is its main purpose in an electrical circuit?

8. Imagine you have two wires, one thick and one thin, both made of the same material and length. Which wire would you expect to have higher resistance, and why?