Particles Basics A-Level

Specific charge is

• charge/absolute mass

• charge/relative mass

• absolute mass/charge

• relative mass/charge

The unit of specific charge is

• Ckg^-1

• kgC^-1

• gC^-1

• Cg^-1

Isotopes are atoms of the same element that have the same number of __________ but different number of __________ . Therefore, isotopes of the same element have different masses. 

• protons, neutrons
• protons, electrons
• neutrons, protons
• electrons, protons

Which best describes the strong nuclear force

• Strongly repulsive at distances less than 0.5fm, and strongly attractive at all distances greater than 0.5fm

• Strongly repulsive at distances less than 0.5fm, and strongly attractive between 0.5fm and 3 fm.

• Strongly attractive at distances less than 0.5fm, and strongly repulsive between 0.5fm and 3 fm.

• Strongly attractive at distances less than 0.5fm, and strongly repulsive at all distances greater than 0.5fm

At which of the following distances is the strong nuclear force strongly attractive?

• 10^-15fm

• 10^-16fm

• 10^-15m

• 10^-16m

What is the strangeness of an anti-strange quark?

• 0

• 1

• -1

What is the quark structure for an anti-proton?

• 
• 
• 
• 

Which particle is correctly described?

• neutron: baryon, ūd

• neutron: meson, udd

• proton: baryon, uud

• positive pion: meson, ūd

Which of the following statements about muons is incorrect?

• A muon is a lepton.

• A muon has a greater mass than an electron.

• A muon is made up of a quark and an anti-quark

• A muon decays via the weak interaction

Which answer shows the correct interactions experienced by a hadron or a lepton?

• Hadron: Strong = Yes. Weak = Yes

• Lepton: Strong = Yes. Weak = Yes

• Hadron: Strong = Yes. Weak = No

• Lepton: Strong = Yes. Weak = No