552210
Beschreibung
Quiz von alex.examtime9373, aktualisiert more than 1 year ago
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Erstellt von alex.examtime9373
vor mehr als 10 Jahre
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Frage 1
Frage
What is the mass of an electron?
Antworten
-
I u
-
- 1 u
-
1/1840 u
-
1/1840 g
Frage 2
Frage
What unit is used to measure the energy of an electron?
Antworten
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Joules
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Watts
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Electronvolts
Frage 3
Frage
Thermionic emission is the emission of electrons from the surface of a hot metal.
Antworten
- True
- False
Frage 4
Frage
What is the work function of a metal?
Antworten
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The minimum energy needed to remove an electron from the surface of a metal.
-
The maximum limit for energy needed to remove an electron from the surface of a metal.
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The minimum frequency required to produce photoelectric emission
Frage 5
Frage
What phenomenon is the cathode ray tube based on?
Antworten
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Photoelectric effect
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Thermionic emission
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X-rays
Frage 6
Frage
X-rays are electromagnetic radiation of extremely long wavelength.
Antworten
- True
- False
Frage 7
Frage
Which of the following is not a component of an X-ray tube?
Antworten
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Cathode & anode
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Filament
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Tungsten target
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Fluorescent screen
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Vacuum
Frage 8
Frage
Calculate the energy of a photon of light of frequency 8 x 10^14
Planck's constant = 6.6 x 10^-34 J s
Antworten
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5.28 × 10^-19
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1.21 x 10^48
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5.28 × 10^19
Frage 9
Frage
What is the charge of a proton?
Antworten
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Neutral
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Positive
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Negative
Frage 10
Frage
In a cathode ray tube, where does thermionic emission occur?
Antworten
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At the cathode
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At the anode
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Along the filament
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Across the fluorescent screen
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