Nuclear and Particle Physics MCQs

Question 1

In ^2211 Na to ^2210 Ne + e^+ + X, X is:

Accepted Answer

an electron neutrino

Answer

an electron antineutrino

Answer

a gamma ray only

Answer

a proton

Question 2

The charge of an anti-down quark (bard) is:

Accepted Answer

+ 13e

Answer

- 23e

Answer

- 13e

Answer

+ 23e

Question 3

Which statement is correct?

Accepted Answer

Leptons are fundamental; hadrons are made of quarks

Answer

Neither are fundamental

Answer

Both are made of quarks

Answer

Hadrons are fundamental; leptons are made of quarks

Question 4

The antineutrino differs from the neutrino in its:

Accepted Answer

lepton number (and handedness)

Answer

charge

Answer

speed

Answer

mass

Question 5

An antiparticle of a particle with charge + 23e has charge:

Accepted Answer

- 23e

Answer

0

Answer

+ 23e

Answer

- 13e

Question 6

The neutrino was first proposed by:

Accepted Answer

Wolfgang Pauli

Answer

James Chadwick

Answer

Isaac Newton

Answer

Niels Bohr

Question 7

Antimatter is described as a 'mirror' of matter because:

Accepted Answer

its particles have opposite charges and quantum numbers

Answer

it is shiny

Answer

it is found in mirrors

Answer

it reflects light

Question 8

Mesons were first predicted by Yukawa as carriers of:

Accepted Answer

the force between nucleons

Answer

gravity

Answer

the electromagnetic force

Answer

the weak force only

Question 9

Gamma rays travel at:

Accepted Answer

the speed of light

Answer

about 10% of light speed

Answer

the speed of sound

Answer

zero

Question 10

In a magnetic field, an electron and a positron with equal speeds curve:

Accepted Answer

with equal radii in opposite directions

Answer

not at all

Answer

the same way

Answer

with different radii

Question 11

The charge of an anti-up quark (baru) is:

Accepted Answer

- 23e

Answer

- 13e

Answer

+ 23e

Answer

+ 13e

Question 12

A scientific theory about mass and force must ultimately be judged by:

Accepted Answer

agreement with experiment

Answer

how old it is

Answer

how elegant it looks only

Answer

the number of authors

Question 13

How many flavours (types) of quark are there?

Accepted Answer

six

Answer

four

Answer

eight

Answer

three

Question 14

Hadrons are particles that:

Accepted Answer

are made of quarks and feel the strong force

Answer

are force carriers only

Answer

are fundamental leptons

Answer

have no mass

Question 15

In beta^- decay, the quark change is:

Accepted Answer

a down quark changes into an up quark

Answer

a strange quark changes into an up quark

Answer

an up quark changes into a down quark

Answer

no quark changes

Question 16

The muon is similar to the electron but:

Accepted Answer

about 200 times heavier

Answer

has no charge

Answer

is a hadron

Answer

is made of quarks

Question 17

In a magnetic field, alpha and beta^- particles are deflected:

Accepted Answer

in opposite directions, beta^- much more

Answer

equally

Answer

in the same direction

Answer

not at all

Question 18

The weak force has a very short range because:

Accepted Answer

the W and Z bosons are very massive

Answer

gluons are confined

Answer

it is very strong

Answer

photons are massless

Question 19

Which is the antiparticle of the proton in quark terms?

Accepted Answer

barubarubard

Answer

udd

Answer

barubardbard

Answer

uud

Question 20

Cosmic rays reaching Earth contain:

Accepted Answer

very little antimatter

Answer

equal matter and antimatter

Answer

no particles at all

Answer

mostly antimatter

Question 21

How many types of lepton are there (not counting antiparticles)?

Accepted Answer

six

Answer

twelve

Answer

three

Answer

two

Question 22

In beta decay, if the electron has less than the maximum energy, the rest is carried by:

Accepted Answer

the antineutrino

Answer

a gamma ray always

Answer

nothing — it is lost

Answer

the nucleus as heat

Question 23

Gravity is not yet included in the Standard Model because:

Accepted Answer

no tested quantum theory of gravity exists

Answer

gravity is not a force

Answer

gravity is a lepton

Answer

gravity is too strong

Question 24

The mass of an alpha particle is about:

Accepted Answer

4 u

Answer

11836 u

Answer

0 u

Answer

1 u

Question 25

In u to d + e^+ + nue, charge balance is:

Accepted Answer

+ 23 = - 13 + 1 + 0

Answer

- 13 = + 23 + 1

Answer

not balanced

Answer

+ 23 = - 13 - 1

Nuclear and Particle Physics MCQs — Physics (page 12)

276. In ^2211 Na to ^2210 Ne + e^+ + X, X is:

277. The charge of an anti-down quark (bard) is:

278. Which statement is correct?

279. The antineutrino differs from the neutrino in its:

280. An antiparticle of a particle with charge + 23e has charge:

281. The neutrino was first proposed by:

282. Antimatter is described as a 'mirror' of matter because:

283. Mesons were first predicted by Yukawa as carriers of:

284. Gamma rays travel at:

285. In a magnetic field, an electron and a positron with equal speeds curve:

286. The charge of an anti-up quark (baru) is:

287. A scientific theory about mass and force must ultimately be judged by:

288. How many flavours (types) of quark are there?

289. Hadrons are particles that:

290. In beta^- decay, the quark change is:

291. The muon is similar to the electron but:

292. In a magnetic field, alpha and beta^- particles are deflected:

293. The weak force has a very short range because:

294. Which is the antiparticle of the proton in quark terms?

295. Cosmic rays reaching Earth contain:

296. How many types of lepton are there (not counting antiparticles)?

297. In beta decay, if the electron has less than the maximum energy, the rest is carried by:

298. Gravity is not yet included in the Standard Model because:

299. The mass of an alpha particle is about:

300. In u to d + e^+ + nue, charge balance is:

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