Fundamental forces

The four fundamental forces and the particles they act upon The concept of exchange particles mediating forces between particles The virtual photon as the exchange particle for the electromagnetic force W+ and W- bosons as exchange particles in weak interaction processes Representing beta decay, electron capture and electron-proton collisions using interaction diagrams

A-Level Physics AQA 10 questions 10 mins

Preview Questions

Q1. Which of the four fundamental forces is responsible for holding quarks together inside a proton?

Multiple Choice · 1 point

· Electromagnetic force
· Weak nuclear force
· Gravitational force
· Strong nuclear force

Q2. Which of the following correctly ranks the four fundamental forces from strongest to weakest?

Multiple Choice · 1 point

· Strong - electromagnetic - weak - gravity
· Electromagnetic - strong - weak - gravity
· Strong - weak - electromagnetic - gravity
· Gravity - electromagnetic - weak - strong

Q3. What is the exchange particle responsible for the electromagnetic force between two charged particles?

Multiple Choice · 1 point

· W+ boson
· Pion
· Virtual photon
· Z0 boson

Q4. Which of the following best explains the role of an exchange particle in a fundamental interaction?

Multiple Choice · 1 point

· It permanently transfers mass from one particle to another
· It carries the force between particles by being emitted and absorbed
· It converts one type of particle into another without transferring energy
· It exists freely in space and can be directly detected

Q5. In β⁻ decay, a neutron transforms into a proton. Which exchange particle mediates this interaction?

Multiple Choice · 1 point

· W+ boson
· Virtual photon
· W- boson
· Pion

Q6. In β⁺ decay, which of the following correctly describes the exchange particle and the transformation that occurs?

Multiple Choice · 1 point

· A W- boson is emitted and a neutron becomes a proton
· A W+ boson is emitted and a proton becomes a neutron
· A virtual photon is emitted and a proton becomes a neutron
· A W+ boson is absorbed and a neutron becomes a proton

Q7. During electron capture, an inner orbital electron is absorbed by a proton in the nucleus. Which of the following correctly describes this interaction?

Multiple Choice · 1 point

· A W- boson is exchanged and the proton becomes a neutron, emitting an electron neutrino
· A W+ boson is exchanged and the proton becomes a neutron, emitting an electron antineutrino
· A virtual photon is exchanged and the proton becomes a neutron
· A W- boson is exchanged and the electron becomes a positron

Q8. An electron collides with a proton. Which exchange particle mediates the weak interaction between them, and what are the products?

Multiple Choice · 1 point

· W+ boson exchanged - products are a neutron and an electron neutrino
· W- boson exchanged - products are a neutron and an electron neutrino
· Virtual photon exchanged - products are a neutron and an electron antineutrino
· W- boson exchanged - products are a neutron and an electron antineutrino

Q9. Which of the following fundamental forces has an infinite range but is the weakest of all four forces?

Multiple Choice · 1 point

· Strong nuclear force
· Weak nuclear force
· Electromagnetic force
· Gravity

Q10. At which range of separation is the strong nuclear force attractive between two nucleons?

Multiple Choice · 1 point

· Less than 0.5 fm
· Between 0.5 fm and 3 fm
· Between 3 fm and 10 fm
· Greater than 10 fm

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