Quiz for Nuclear Physics

Q1: What is the unit of radioactivity?

A. Becquerel B. Gray C. Sievert D. Joule

Q2: Which of the following particles is emitted in beta-minus decay?

A. Electron B. Proton C. Neutron D. Alpha particle

Q3: The energy released in nuclear fission is primarily due to:

A. Mass defect B. Electron loss C. Gravitational force D. Strong nuclear force

Q4: Which force binds protons and neutrons in the nucleus?

A. Electromagnetic force B. Gravitational force C. Nuclear force D. Centrifugal force

Q5: What is the binding energy per nucleon for a stable nucleus approximately?

A. 1 MeV B. 5 MeV C. 8 MeV D. 20 MeV

Q6: Which isotope is commonly used in nuclear fission reactors?

A. U-238 B. U-235 C. Th-232 D. Pu-240

Q7: The half-life of a radioactive substance is the time in which:

A. All atoms decay B. Half of the atoms decay C. One-third of the atoms decay D. No atoms decay

Q8: The decay constant (λ) is related to the half-life (T½) by:

A. λ = T½ / ln2 B. λ = ln2 / T½ C. λ = T½ * ln2 D. λ = 2T½ / ln2

Q9: Which radiation has the highest penetrating power?

A. Alpha B. Beta C. Gamma D. Neutron

Q10: What is the main product of fusion reaction in the sun?

A. Carbon B. Helium C. Oxygen D. Nitrogen

Q11: Mass defect is converted into which form of energy?

A. Thermal B. Light C. Nuclear D. Binding energy

Q12: In fission, the parent nucleus splits into:

A. One large nucleus B. Two nearly equal nuclei C. Three small nuclei D. Electrons and protons

Q13: What is the charge on an alpha particle?

A. +2 B. +1 C. -1 D. 0

Q14: Which of these is NOT a radioactive isotope?

A. U-235 B. C-14 C. Co-60 D. O-16

Q15: The number of protons in a nucleus is known as:

A. Mass number B. Atomic number C. Neutron number D. Binding number

Q16: Which reaction is responsible for energy in hydrogen bomb?

A. Nuclear fission B. Nuclear fusion C. Beta decay D. Alpha decay

Q17: Which of the following has maximum mass defect per nucleon?

A. Hydrogen B. Uranium C. Iron D. Lead

Q18: If a radioactive sample decays from 100 g to 25 g in 6 hours, what is its half-life?

A. 2 hours B. 3 hours C. 6 hours D. 4 hours

Q19: Which process is used in atom bombs?

A. Nuclear fission B. Nuclear fusion C. Photoelectric effect D. Compton effect

Q20: What is emitted in alpha decay?

A. 2 protons and 2 neutrons B. 1 neutron C. 1 proton and 1 electron D. 1 electron