The Electron: Quiz

Descripción

This quiz covers topics learnt in the mind map on the electron, and the corresponding notes on subatomic particles, energy, thermionic emission, x-rays and the photoelectric effect.
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Test por alex.examtime9373, actualizado hace más de 1 año
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Creado por alex.examtime9373 hace más de 10 años
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Resumen del Recurso

Pregunta 1

Pregunta
What is the mass of an electron?
Respuesta
  • I u
  • - 1 u
  • 1/1840 u
  • 1/1840 g

Pregunta 2

Pregunta
What unit is used to measure the energy of an electron?
Respuesta
  • Joules
  • Watts
  • Electronvolts

Pregunta 3

Pregunta
Thermionic emission is the emission of electrons from the surface of a hot metal.
Respuesta
  • True
  • False

Pregunta 4

Pregunta
What is the work function of a metal?
Respuesta
  • 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.
  • The minimum frequency required to produce photoelectric emission

Pregunta 5

Pregunta
What phenomenon is the cathode ray tube based on?
Respuesta
  • Photoelectric effect
  • Thermionic emission
  • X-rays

Pregunta 6

Pregunta
X-rays are electromagnetic radiation of extremely long wavelength.
Respuesta
  • True
  • False

Pregunta 7

Pregunta
Which of the following is not a component of an X-ray tube?
Respuesta
  • Cathode & anode
  • Filament
  • Tungsten target
  • Fluorescent screen
  • Vacuum

Pregunta 8

Pregunta
Calculate the energy of a photon of light of frequency 8 x 10^14 Planck's constant = 6.6 x 10^-34 J s
Respuesta
  • 5.28 × 10^-19
  • 1.21 x 10^48
  • 5.28 × 10^19

Pregunta 9

Pregunta
What is the charge of a proton?
Respuesta
  • Neutral
  • Positive
  • Negative

Pregunta 10

Pregunta
In a cathode ray tube, where does thermionic emission occur?
Respuesta
  • At the cathode
  • At the anode
  • Along the filament
  • Across the fluorescent screen
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