Physics 222 Worksheet: Quantum Physics

Questions in this worksheet are based on chapters 27 - 29 in Giancoli.

1) A proton and an electron have the same kinetic energy.

a) Both have the same wavelength

b) The proton has the greatest wavelength.

c) The electron has the greatest wavelength.

d) Neither one has a wavelength because they are particles, not waves.

2) An electron and a proton with the same wavelength enter a magnetic field.

a) The proton will move in an orbit of greater radius than the electron.

b) The proton will move in an orbit of smaller radius than the electron.

c) Both particles will move in orbits of the same radius.

3) The photoelectric effect occurs when:

a) the energy of the photon exceeds the work function of the surface.

b) the energy of the photon is less than the work function of the surface.

c) the energy of the photon exceeds the rest mass energy of an electron.

d) the wavelength of the photon equals the wavelength of the electron.

4) According to Bohr’s theory of the hydrogen atom, when an electron makes a transition from a high to a low energy level:

a) a photon is absorbed.

b) a photon is emitted

c) the total energy of the atom is unchanged.

5) How many different states are possible in the L shell?

a) 2

b) 6

c) 8

d) 10

6) How many states are possible in an f subshell?

a) 10

b) 14

c) 18

7) Consider an atom with electron configuration 1s²2s^{2 2p5} ?

a) It contains five electrons.

b) The electrons occupy the first three shells.

c) It is chemically inert.

d) It is in group VII.

8) The circuit device used to convert AC to DC is called a(n):

a) rectifier.

b) transformer.

c) transistor.

d) amplifier.

9) An n - type semiconductor is produced by doping silicon with atoms from group

a) III

b) IV

c) V

Ans: 1-c, 2-c, 3-a, 4-b, 5-c, 6-b, 7-d, 8-a, 9-c