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•20 Qs
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Quantum Physics
Quiz
•
Physics, Science
•
12th Grade - University
•
Practice Problem
•
Medium
+1
Standards-aligned
Jay Rarugal
Used 827+ times
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20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Photoelectrons will be ejected from a material surface if?
The threshold frequency is greater than the photon frequency
The work function is less than the photon energy
The intensity of light is high enough
The wavelength of photon is maximum
Tags
NGSS.HS-PS4-1
NGSS.HS-PS4-3
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A monochromatic light beam with a quantum energy of 9.0 eV is incident upon a photocell. The work function of the photocell is 4.1 eV. What is the maximum kinetic energy of the electron.
4.2 eV
4.4 eV
4.7 eV
4.9 eV
Tags
NGSS.HS-PS4-1
NGSS.HS-PS4-3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In an experiment, photoelectric effect is observed in metal A when light with frequency (f ) falls on the metal. If the light frequency used in this experiment is doubled, the photoelectrons
Will not be ejected
Will be ejected as observed in the previous
Will be ejected with greater number of photoelectrons
Will be ejected with greater kinetic energy
Tags
NGSS.HS-PS4-3
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A metal surface is struck with light of λ = 400 nm, releasing a stream of electrons. If the 400 nm light is replaced by λ= 300 nm light of the same intensity, what is the result?
More electrons are emitted in a given time interval
Fewer electrons are emitted in a given time interval
Emitted electrons are more energetic
Emitted electrons are less energetic
Tags
NGSS.HS-PS4-3
NGSS.HS-PS4-4
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A metal surface is struck with light of λ = 400 nm, releasing a stream of electrons. If the light intensity is increased (without changing λ ), what is the result?
More electrons are emitted in a given time interval
Fewer electrons are emitted in a given time interval
Emitted electrons are more energetic
Emitted electrons are less energetic
Tags
NGSS.HS-PS4-3
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The SI unit of frequency is the __________.
meter
second
hertz
meter per second
Tags
NGSS.HS-PS4-1
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
True or False? The wavelength and frequency of all waves are inversely proportional to each other.
True
False
Tags
NGSS.HS-PS4-1
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