1. What type of rays are produced when a metal target is bombarded with high energy electrons?
A. Alpha rays
B. Beta rays
C. Gamma rays
2. What is the charge of a positron?
3. What is the effect of a positive ray on a photographic plate?
A. It causes a darkening of the plate
B. It causes a lightening of the plate
C. It causes no effect on the plate
D. It causes the plate to become radioactive
4. What is the main difference between a positive ray and an alpha particle?
A. Positive rays are negatively charged, while alpha particles are positively charged
B. Positive rays are faster than alpha particles
C. Positive rays are heavier than alpha particles
D. Positive rays are more radioactive than alpha particles
5. How are positive rays produced in a cathode ray tube?
A. By the collision of electrons with a metal target
B. By the collision of protons with a metal target
C. By the collision of alpha particles with a metal target
D. By the collision of gamma rays with a metal target
6. What is the name of the phenomenon where a positron and an electron annihilate each other and produce gamma rays?
A. Positron emission
B. Electron capture
C. Positron-electron annihilation
D. Gamma ray production
7. What is the main use of positive rays in medical imaging?
A. To diagnose cancer
B. To detect bone fractures
C. To visualize blood vessels
D. To monitor the progress of a pregnancy
8. What is the difference between a positive ray and a gamma ray?
A. Positive rays are composed of protons, while gamma rays are composed of photons
B. Positive rays are produced by radioactive decay, while gamma rays are produced by nuclear reactions
C. Positive rays are absorbed by lead, while gamma rays can pass through lead
D. Positive rays are composed of electrons, while gamma rays are composed of positrons
9. How are positive rays detected?
A. By their ability to ionize gases
B. By their ability to cause a fluorescence in certain materials
C. By their ability to produce a visible light
D. By their ability to produce a sound
10. What is the energy of a positive ray?
A. It is variable and depends on the source
B. It is always the same
C. It is always lower than that of a gamma ray
D. It is always higher than that of an alpha particle