Physics 11th Chap 14 : Topic 6 - Maryam Publications

Physics Chapter 14 : Topic 6

Quarks and Antiquarks

1 / 35

Quarks are considered to be:

A) Particles with no mass or charge

B) Electromagnetic waves

C) Fundamental particles that make up hadrons

D) Composite particles made of protons

2 / 35

The basic building blocks of protons and neutrons are:

A) Neutrinos

B) Photons

C) Quarks

D) Electrons

3 / 35

The number of known quark flavors (types) is:

A) Eight

B) Two

C) Four

D) Six

4 / 35

Which of the following is NOT a quark flavor?

A) Strange

B) Electron

C) Charm

D) Up

5 / 35

The six flavors of quarks are:

A) Up, down, strange, charm, top, bottom

B) Proton, neutron, electron, muon, tau, photon

C) Red, blue, green, yellow, black, white

D) Alpha, beta, gamma, neutrino, antineutrino, photon

6 / 35

The electric charge of an up quark is:

A) $\mathbf{- \ e}$

B) $\mathbf{+ \ 2/3\ e}$

C) $\mathbf{+ \ e}$

D) $\mathbf{- \ 1/3\ e}$

7 / 35

A quark is different from an electron because:

A) Quarks have fractional electric charges.

B) Electrons are made of quarks.

C) Quarks have no mass.

D) Electrons form protons.

8 / 35

The electric charge of a down quark is:

A) $\mathbf{- \ e}$

B) $\mathbf{+ \ e}$

C) $\mathbf{+ \ 2/3\ e}$

D) $\mathbf{- \ 1/3\ e}$

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Which pair represents quarks with the same electric charge type?

A) Up and down

B) Top and bottom

C) Strange and charm

D) Up and charm

10 / 35

Which group contains only down-type quarks?

A) Charm, bottom, up

B) Up, strange, top

C) Down, strange, bottom

D) Up, charm, top

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An antiquark is:

A) A heavier form of quark only

B) The antimatter partner of a quark

C) A particle without charge

D) A quark with the same charge

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The charge of an antiquark compared with its corresponding quark is:

A) Double

B) Always zero

C) The same

D) Opposite

13 / 35

The antiparticle of an up quark has charge:

A) $\mathbf{+ \ 2/3\ e}$

B) $\mathbf{- \ e}$

C) $\mathbf{+ \ 1/3\ e}$

D) $\mathbf{- \ 2/3\ e}$

14 / 35

The antiparticle of a down quark has charge:

A) $\mathbf{+ \ 1/3\ e}$

B) $\mathbf{- \ 1/3\ e}$

C) $\mathbf{- \ 2e}$

D) $\mathbf{+ \ 2/3\ e}$

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Which particles are made of three quarks?

A) Leptons

B) Baryons

C) Mesons

D) Photons

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A proton consists of:

A) One up quark and two down quarks

B) Three up quarks

C) Three down quarks

D) Two up quarks and one down quark

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A neutron consists of:

A) Three strange quarks

B) Three up quarks

C) Two down quarks and one up quark

D) Two charm quarks and one top quark

18 / 35

The total charge of a proton can be calculated from its quarks as:

A) $\mathbf{( - \ 2/3\ e) + ( - \ 2/3\ e) + ( + \ 1/3\ e) = - \ e}$

B) $\mathbf{( + \ 2/3\ e) + ( + \ 2/3\ e) + ( - \ 1/3\ e) = + \ e}$

C) $\mathbf{( + \ 2/3\ e) + ( - \ 1/3\ e) = + \ e}$

D) $\mathbf{( + \ 1/3\ e) + ( + \ 1/3\ e) + ( + \ 1/3\ e) = + \ e}$

19 / 35

The total charge of a neutron is:

A) Zero

B) $\mathbf{- \ e}$

C) $\mathbf{+ \ 2e}$

D) $\mathbf{+ \ e}$

20 / 35

Which of the following is a hadron?

A) Electron

B) Proton

C) Neutrino

D) Photon

21 / 35

Quarks are never normally observed individually because:

A) They are confined inside composite particles.

B) They have no charge.

C) They have infinite mass.

D) They do not interact.

22 / 35

Which fundamental interaction is mainly responsible for holding quarks together?

A) Electromagnetic force

B) Strong nuclear force

C) Gravitational force

D) Weak force

23 / 35

Which statement about quark mass is correct?

A) Different quark flavors have different masses.

B) All quarks have identical masses.

C) Only up quarks have mass.

D) Quarks have no mass.

24 / 35

The heaviest known quark is:

A) Top

B) Strange

C) Down

D) Up

25 / 35

Which quark has the smallest mass among the six flavors?

A) Up

B) Charm

C) Bottom

D) Top

26 / 35

Which particle combination forms a meson?

A) Three electrons

B) Proton and neutron

C) Quark and antiquark

D) Three quarks

27 / 35

Which statement correctly describes quarks and antiquarks?

A) They cannot interact.

B) They have opposite charges.

C) They have no relation.

D) They have the same charge.

28 / 35

A particle made from a quark and an antiquark is called:

A) Lepton

B) Nucleus

C) Meson

D) Baryon

29 / 35

Which of the following correctly pairs a quark with its antiquark?

A) Charm and strange

B) Up and anti-up

C) Up and down

D) Proton and neutron

30 / 35

A particle contains two up quarks and one down quark. It is:

A) Proton

B) Neutron

C) Meson

D) Electron

31 / 35

Which statement about quarks is correct?

A) They are fundamental particles.

B) They have only whole-number charges.

C) They are larger particles made from protons.

D) They are types of electromagnetic radiation.

32 / 35

The charge of a bottom quark is:

A) $\mathbf{- \ e}$

B) $\mathbf{- \ 1/3\ e}$

C) $\mathbf{+ \ e}$

D) $\mathbf{+ \ 2/3\ e}$

33 / 35

The charge of a charm quark is:

A) $\mathbf{- \ 2/3\ e}$

B) Zero

C) $\mathbf{+ \ 2/3\ e}$

D) $\mathbf{- \ 1/3\ e}$

34 / 35

Which set contains only up-type quarks?

A) Up, charm, top

B) Charm, strange, down

C) Down, strange, bottom

D) Up, strange, bottom

35 / 35

Which set contains only down-type quarks?

A) Down, strange, bottom

B) Up, charm, top

C) Charm, bottom, top

D) Up, strange, charm

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