PH-115 FINAL UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS

PH-115 FINAL UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS

Question:
1. The breakdown voltage of a gas depends on its
Answer:
density, temperature, partial pressure

Question:
2. Inductive charging is due to
Answer:
the Coulomb force

Question:
3. The charges on a randomly-shaped conductor always reside
Answer:
at the surface

Question:
4. The electron is less massive than the proton
Answer:
true

Question:
5. The neutron is much less massive than the proton
Answer:
False

Question:
6. An electrostatic luminous spark is a result of
Answer:
collisions between ions or electrons and air molecules

Question:
7. A Faraday cage can be constructed from
Answer:
A conductor

Question:
8. Inside a Faraday cage the electric field is
Answer:
Zero

Question:
9. A photon has

, Answer:
No charge

Question:
10. The typical radius of an atom is closer to
Answer:
10^(-15) m

Question:
11. At any given time there are electron in the air that we breathe
Answer:
True

Question:
12. When accelerated electrons collide with air molecules one of the likely "byproducts" is
Answer:
a photon

Question:
13. The inductive charging (i.e. the reason why we used the smaller dome in the lab) acquires the opposite
change than the main Van de Graaf (VDG) dome is because
Answer:
The repelling forces between electrons

Question:
14. The charges on the VDG reside
Answer:
on the surface

Question:
15. The sound from the electrostatic luminous spark we observed in the lab is a result of
Answer:
None of these on the list

Question:
16. The charges generated by the VDG are because of
Answer:
Frictional forces

Question:
17. At its natural state air is
Answer:
an electrical insulator

Question:
18. One argues that because the proton is much larger in mass than the electron, it creates a much stronger
electric field at the same distance than the electron does. This statement is