Al Al-Bayt University
Faculty of Science
Physics Department
Homework # 1
Elementary Particle Physics (0402465)
Instructor: Dr. Ahmed Al-Jamel
Problem 1: Choose the most appropriate answers:
1. An electron participates in:
A) the strong force only
B) the strong and weak forces only
C) the electromagnetic and gravitational forces only
D) the electromagnetic, gravitational, and weak forces only
E) the electromagnetic, gravitational, and strong forces only
2. All leptons interact with each other via the:
A) strong force
D) strange force
B) weak force
E) none of these
C) electromagnetic force
3. A particle can decay to particles with greater rest mass:
A) only if antiparticles are produced
B) only if photons are also produced
C) only if neutrinos are also produced
D) only if the original particle has kinetic energy
E) never
4. Any baryon is a combination of:
A) three quarks
B) two quarks and an antiquark
C) one quark and two antiquarks
D) one quark and one antiquark
E) two quarks
5. Quarks are the constituents of:
A) all particles
B) all leptons
C) all strongly interacting particles
D) only strange particles
E) only mesons
6. Any meson is a combination of:
A) three quarks
B) two quarks and an antiquark
C) one quark and two antiquarks
D) one quark and one antiquark
E) two quarks
7. The two basic interactions that have finite ranges are:
A) electromagnetic and gravitational
D) gravitational and weak
B) electromagnetic and strong
E) weak and strong
C) electromagnetic and weak
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8. Messenger particles of the strong interaction are called:
A) gluons
B) photons
C) W and Z
D) gravitons
E) pions
9. Messenger particles of the electromagnetic interaction are called:
A) gluons
B) photons
C) W and Z
D) gravitons
E) pions
10. Messenger particles of the weak interaction are called:
A) gluons
B) photons
C) W and Z
D) gravitons
E) pions
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