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Chapter 1 - Electric Current, Ohms Law and Kirchhoffs Laws

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Chapter 2 - Magnetic Effects of Electric Current and Measuring Instruments

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Chapter 3 - Electromagnetic Induction and AC Dynamo and Transformer

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Chapter 4 - Alternating Current AC Circuits

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Chapter 5 - Dual Nature of Wave and Particle

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Chapter 6 - Atomic Spectra and X-Rays

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Chapter 7 - Lasers and Principles

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Chapter 8 - Modern Electronics and Semiconductors

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Quiz

Lesson 2: The Photoelectric Effect, Compton Scattering and De Broglie Wavelength — Picture questions (exam style)

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  • Questions count: 13
  • Passing grade: 60%
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1.
Light of photon energy 3 eV falls on a metal of work function 2.0 eV (circuit shown). What is the effect of doubling the light intensity?
Light of photon energy 3 eV falls on a metal of work function 2.0 eV (circuit shown). What is the effect of doubling the light intensity?
number of photoelectrons decreases, stopping potential decreases
number of photoelectrons unchanged, stopping potential increases
number of photoelectrons increases, stopping potential unchanged
number of photoelectrons decreases, stopping potential unchanged
2.
Light of wavelength 450 nm falls on the four metals in the table. From how many are photoelectrons emitted?
Light of wavelength 450 nm falls on the four metals in the table. From how many are photoelectrons emitted?
3
1
2
4
3.
Using the graph, what is the maximum kinetic energy of the photoelectrons?
Using the graph, what is the maximum kinetic energy of the photoelectrons?
0.700 J
1.12×10−19 J
2.24×10−19 J
4.38×1018 J
4.
Using the graph, what is the maximum kinetic energy of the photoelectrons?
Using the graph, what is the maximum kinetic energy of the photoelectrons?
5.00×1018 J
1.28×10−19 J
0.800 J
2.56×10−19 J
5.
Using the graph, what is the maximum kinetic energy of the photoelectrons?
Using the graph, what is the maximum kinetic energy of the photoelectrons?
1.00 J
1.60×10−19 J
6.25×1018 J
3.20×10−19 J
6.
Using the graph, what is the maximum kinetic energy of the photoelectrons?
Using the graph, what is the maximum kinetic energy of the photoelectrons?
1.20 J
1.92×10−19 J
3.84×10−19 J
7.50×1018 J
7.
Using the graph, what is the maximum kinetic energy of the photoelectrons?
Using the graph, what is the maximum kinetic energy of the photoelectrons?
1.12×1019 J
5.76×10−19 J
1.80 J
2.88×10−19 J
8.
Using the graph, what is the maximum kinetic energy of the photoelectrons?
Using the graph, what is the maximum kinetic energy of the photoelectrons?
4.32×10−19 J
2.70 J
1.69×1019 J
8.64×10−19 J
9.
Using the graph, what is the maximum kinetic energy of the photoelectrons?
Using the graph, what is the maximum kinetic energy of the photoelectrons?
1.88×1019 J
3.00 J
9.60×10−19 J
4.80×10−19 J
10.
Using the graph, what is the maximum kinetic energy of the photoelectrons?
Using the graph, what is the maximum kinetic energy of the photoelectrons?
2.10 J
1.31×1019 J
3.36×10−19 J
6.72×10−19 J
11.
Using the graph, what is the threshold frequency?
Using the graph, what is the threshold frequency?
5.13×1033 Hz
8.21×1014 Hz
1.31×1015 Hz
4.10×1014 Hz
12.
Using the graph, what is the threshold frequency?
Using the graph, what is the threshold frequency?
5.28×1033 Hz
8.45×1014 Hz
4.22×1014 Hz
1.35×1015 Hz
13.
Using the graph, what is the maximum kinetic energy of the photoelectrons?
Using the graph, what is the maximum kinetic energy of the photoelectrons?
2.56×10−19 J
1.60 J
5.12×10−19 J
1.00×1019 J
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