quiz 5 rad phys

Question 1

Customary vs SI table

Answer 1

exposure: roetgen (R) = air kerma (Gya)
absorbed dose; Rad (rad) = gray (Gyt)
effective dose: Rem (rem) = Sievert (Sv)
radioactivity: Curie (Ci) = Becquerel (Bq)

Question 2

ISL

Answer 2

I 1 (D2)2
— = ——
I 2 (D1)2

*dont forget to sq root it if needed !

Question 3

Plancks Constant (h)

Answer 3

photon energy is directed proportional to photon frequency

Question 4

electrostatistics

Answer 4

study of stationary electric charges

Question 5

Wave particle duality

Answer 5

when high frequency EM interacts with matter it behaves like a particle

Question 6

4 laws associated with electric charges and how they interact with each other and neutral objects

Answer 6

1. unlike charges attract - like charges repel
2. electric field is associated with each electric charge
3. when 2 similar electric charges are brought close together, their electric fields are in opposite directions, which causes charges to repel each other
4. when unlike charges are close together, electric fields radiate in the same direction and cause 2 charges to attract each other

Question 7

3 methods of electrification

Answer 7

1. friction
2. contact
3. induction

Question 7

electrification

Answer 7

transfer of electrons

Question 8

electrodynamics

Answer 8

study of electrons

Question 9

electric potential

Answer 9

electric charges, measured in volts (V) and joule/coulomb
1v=1 J/C
high voltage= greater potential

Question 10

Coulombs law

Answer 10

magnitude of electrostatic force
- first to measure amount of electricity and magnetism generated in a circuit

Question 11

electric current direction

Answer 11

current: + > -
electrons: - > +

Question 12

4 electrical states of matter

Answer 12

1. insulator
2. conductor
3. semi-conductor
4. super-conductor

Question 13

insulator

Answer 13

any material that does not allow electron flow (EX: GLASS, CLAY)

Question 14

conductor

Answer 14

any substance through which electrons flow easily (EX: METAL,COPPER, WATER)

Question 15

semi-conductor

Answer 15

material that under some conditions behaves as an insulator and in other conditions behaves as a conductor (EX: SILICON (si))

Question 16

super- conductor

Answer 16

property of some materials to exhibit no resistance below a critical temperature (Tc) (EX: NIOBIUM, TITANIUM)