Fundamental Forces Y13

Which three forces are explained by the standard model of particle physics?

• strong, weak, electromagnetic

• strong, weak, gravity

• strong, gravity, weak

• electromagnetic, weak, gravity

What particles does the strong force act on?

• quarks

• leptons

• quarks and leptons

• particles with charge

What is the weak force responsible for?

• holding nucleons together in the nucleus

• beta decay (changing quark flavour)

• electrostatic repulsion and attraction

• gravity

What is the force carrier for the strong force?

• graviton

• photon

• W and Z bosons

• gluons and pions

What are the force carriers for the weak force?

• W and Z bosons

• hadrons

• photons

• pions

What range does the strong force have?

• infinite

If the strong force has a relative strength of 1, what is the relative strength of the weak force?

• 1/137

• negligible

Which two fundamental forces obey an inverse square law?

• strong and gravi

• gravity and electromagnetic

• electromagnetic and weak

• strong and weak

What conservation law does the weak force violate?

• charge

• baryon number

• lepton number

• strangeness

If an interaction involves no leptons and no charged particles, it is probably a...

• strong interaction

• weak interaction

• electromagnetic interaction

• any interaction