A Level Physics Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Study for the A Level Physics Exam. Our quiz features flashcards and multiple choice questions, each with hints and explanations. Prepare thoroughly!

Start Multiple Choice Practice Test
Start Flash Cards

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What is a characteristic of leptons?

  1. They are made up of quarks

  2. They experience the electromagnetic force

  3. They do not experience the strong force

  4. They have mass

The correct answer is: They do not experience the strong force

Leptons are indeed unique among subatomic particles, and one of their defining characteristics is that they do not experience the strong nuclear force. This force is responsible for holding the protons and neutrons together in an atomic nucleus and is only experienced by particles known as hadrons, which include baryons (like protons and neutrons) and mesons. Leptons, on the other hand, interact through the weak nuclear force, the electromagnetic force (if they are charged), and gravity, but they are completely unaffected by the strong force. This distinction is essential to understanding the behavior of fundamental particles in the universe. While leptons do have mass, as indicated in one of the other options, the defining characteristic that separates them from other fundamental particles like quarks is their lack of interaction with the strong force.

More Questions Like This