A physics exam may encompass a broad spectrum of topics, including integer-based problem-solving in areas such as classical mechanics (+5), electromagnetism (-3), thermodynamics (+2), quantum mechanics (-7), and relativity (+4). Students are often challenged with integer-related calculations, requi...
SECTION A
ANSWER ALL QUESTIONS ON THE GRID PAPER PROVIDED
QUESTION A1
In the photoelectric effect experiment, why does red light not cause the emission of an
electron though blue light can?
A The photons of red light do not have sufficient energy to eject an electron.
B The electric field of the red light oscillates too slowly to eject an electron.
C Red light contains fewer photons than blue, not enough to eject electrons.
D The red light does not penetrate far enough into the metal electrode.
QUESTION A2
Which of the following phenomena is best explained by treating light as a wave?
A The threshold frequency in the photoelectric effect
B The emission of only certain wavelengths of light by an excited gas
C The limited resolution of a light microscope
D None of the above
QUESTION A3
According to the Heisenberg’s Uncertainty Principle, if we know the x-position of a particle
precisely, we cannot know its precise:
A y-position
B x-momentum
C y-momentum
D energy
QUESTION A4
Which of the following ideas of the Bohr model is not retained in the modern theory of atomic
structure?
A Electrons can absorb or emit energy only in whole numbers of photons.
B Atoms have a central positively charged nucleus.
C Electrons move around the nucleus as planets orbit the sun.
D Most of the volume of an atom is empty space.
QUESTION A5
The idea that no two electrons can have exactly the same set of quantum numbers is
expressed in the:
A Heisenberg’s probability position.
B Pauli exclusion principle.
C Plank’s constant
D Bohr’s model.
QUESTION A6
Which set of quantum numbers cannot occur together to specify an orbital?
A n = 2, l = 1, ml = -1, ms = ½
B n = 3, l = 2, ml = 0, ms = ½
C n = 3, l = 3, ml = 2, ms = ½
D n = 4, l = 3, ml = 0, ms = ½
, PHYSICS PHY2ZAT -2-
QUESTION A7
Which of the following statements is correct?
A Earth's geographic north pole is the magnetic north.
B The north pole of a magnet points towards the Earth's magnetic south pole.
C Like poles of a magnet attract each other and unlike poles repel.
D The SI unit of the magnetic field is the gauss.
QUESTION A8
The diagram below shows a current-carrying wire located in a magnetic field that is directed
towards the top of the page.
The magnetic force on the wire is directed out of the page. In the wire, the electron flow is
directed toward the
A right
B top of page
C left
D bottom of page
QUESTION A9
The path ABC in the diagram was followed by a charged particle in a cloud chamber.
If the magnetic field is directed into the page, the particle is
A positively charged and moved from A to C
B negatively charged and has moved from C to A
C positively charged and has moved from A to C
D negatively charge and has moved from A to C
15/…
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller youngjzlfaxe. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $19.91. You're not tied to anything after your purchase.
