Nuclear and Particle Physics MCQs

Question 1

A nucleus of ^126 C contains how many quarks?

Accepted Answer

36

Answer

24

Answer

18

Answer

12

Question 2

Most alpha particles emitted by a given radioactive source have the same range in air because:

Accepted Answer

they have the same initial energy

Answer

air is uniform

Answer

they are heavy

Answer

they are positively charged

Question 3

Baryon number of a baryon is +1; for a meson it is:

Accepted Answer

0

Answer

+3

Answer

-1

Answer

+1

Question 4

The asymmetry is linked to physics beyond the Standard Model because:

Accepted Answer

the Standard Model alone can't produce enough asymmetry

Answer

the Standard Model is about chemistry

Answer

the Standard Model includes no antimatter

Answer

the Standard Model forbids matter

Question 5

How many down quarks are in a proton?

Accepted Answer

1

Answer

0

Answer

3

Answer

2

Question 6

The fact that alpha particles have discrete energies is evidence that:

Accepted Answer

nuclei have discrete energy levels

Answer

alphas are photons

Answer

nuclei are continuous

Answer

energy is not conserved

Question 7

The two families of hadrons are:

Accepted Answer

baryons and mesons

Answer

electrons and neutrinos

Answer

leptons and quarks

Answer

photons and gluons

Question 8

Particle accelerators use fields to speed up charged particles.

Accepted Answer

electric

Answer

gravitational

Answer

magnetic

Answer

sound

Question 9

The photon is the exchange particle for the:

Accepted Answer

electromagnetic force

Answer

strong force

Answer

gravitational force

Answer

weak force

Question 10

In alpha decay, the energy is shared between:

Accepted Answer

the alpha particle and the daughter nucleus (two bodies)

Answer

three particles

Answer

the electron and neutrino

Answer

photons only

Question 11

Which list gives all six quark flavours?

Accepted Answer

up, down, strange, charm, top, bottom

Answer

red, green, blue, up, down, strange

Answer

electron, muon, tau, up, down, charm

Answer

up, down, left, right, top, bottom

Question 12

The tau lepton is:

Accepted Answer

the heaviest charged lepton

Answer

the lightest lepton

Answer

a neutral hadron

Answer

a force carrier

Question 13

Each photon from electron–positron annihilation at rest has energy:

Accepted Answer

0.511 MeV

Answer

938 MeV

Answer

1.02 MeV

Answer

0 MeV

Question 14

In beta^- decay, the particles emitted are:

Accepted Answer

an electron and an electron antineutrino

Answer

a positron and a neutrino

Answer

an alpha particle and a gamma ray

Answer

an electron and a neutrino

Question 15

The antineutron, though neutral like the neutron, differs because:

Accepted Answer

it is made of antiquarks

Answer

it has charge

Answer

it is a lepton

Answer

it has a different mass

Question 16

String theory proposes that fundamental particles are:

Accepted Answer

tiny vibrating strings in higher dimensions

Answer

tiny spheres

Answer

magnetic dipoles

Answer

points with no properties

Question 17

Supersymmetry is a theory that proposes:

Accepted Answer

every known particle has a heavier 'superpartner'

Answer

gravity is fake

Answer

there is no antimatter

Answer

particles have no mass

Question 18

The Z boson has charge:

Accepted Answer

zero

Answer

+e

Answer

+2e

Answer

-e

Question 19

The strong force between quarks:

Accepted Answer

does not weaken as quarks are pulled apart, so they can't be isolated

Answer

acts only on electrons

Answer

is repulsive only

Answer

is weaker than gravity

Question 20

Peter Higgs shared the Nobel Prize in Physics in 2013 with:

Accepted Answer

François Englert

Answer

Albert Einstein

Answer

Richard Feynman

Answer

Stephen Hawking

Question 21

The charge of K^+ (ubars) is:

Accepted Answer

+e

Answer

0

Answer

+ 13e

Answer

-e

Question 22

Stars, planets and people are made of:

Accepted Answer

matter

Answer

pure energy

Answer

dark energy

Answer

antimatter

Question 23

CP violation was first observed in the decay of:

Accepted Answer

kaons (1964)

Answer

photons

Answer

electrons

Answer

protons

Question 24

The equation for beta^- decay of a neutron is:

Accepted Answer

n to p + e^- + barnue

Answer

p to n + e^- + barnue

Answer

n to p + e^+ + nue

Answer

n to p + e^-

Question 25

Each quark has a corresponding:

Accepted Answer

antiquark with opposite charge

Answer

lepton of the same charge

Answer

photon

Answer

neutrino

Nuclear and Particle Physics MCQs — Physics (page 8)

176. A nucleus of ^126 C contains how many quarks?

177. Most alpha particles emitted by a given radioactive source have the same range in air because:

178. Baryon number of a baryon is +1; for a meson it is:

179. The asymmetry is linked to physics beyond the Standard Model because:

180. How many down quarks are in a proton?

181. The fact that alpha particles have discrete energies is evidence that:

182. The two families of hadrons are:

183. Particle accelerators use fields to speed up charged particles.

184. The photon is the exchange particle for the:

185. In alpha decay, the energy is shared between:

186. Which list gives all six quark flavours?

187. The tau lepton is:

188. Each photon from electron–positron annihilation at rest has energy:

189. In beta^- decay, the particles emitted are:

190. The antineutron, though neutral like the neutron, differs because:

191. String theory proposes that fundamental particles are:

192. Supersymmetry is a theory that proposes:

193. The Z boson has charge:

194. The strong force between quarks:

195. Peter Higgs shared the Nobel Prize in Physics in 2013 with:

196. The charge of K^+ (ubars) is:

197. Stars, planets and people are made of:

198. CP violation was first observed in the decay of:

199. The equation for beta^- decay of a neutron is:

200. Each quark has a corresponding:

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