Test
The Electron: Quiz
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Preguntas del test (10)
1What is the mass of an electron?
- AI u
- B- 1 u
- C1/1840 u
- D1/1840 g
2What unit is used to measure the energy of an electron?
- AJoules
- BWatts
- CElectronvolts
3Thermionic emission is the emission of electrons from the surface of a hot metal.
- AVerdadero
- BFalso
4What is the work function of a metal?
- AThe minimum energy needed to remove an electron from the surface of a metal.
- BThe maximum limit for energy needed to remove an electron from the surface of a metal.
- CThe minimum frequency required to produce photoelectric emission
5What phenomenon is the cathode ray tube based on?
- APhotoelectric effect
- BThermionic emission
- CX-rays
6X-rays are electromagnetic radiation of extremely long wavelength.
- AVerdadero
- BFalso
7Which of the following is not a component of an X-ray tube?
- ACathode & anode
- BFilament
- CTungsten target
- DFluorescent screen
- EVacuum
8Calculate the energy of a photon of light of frequency 8 x 10^14
Planck's constant = 6.6 x 10^-34 J s- A5.28 × 10^-19
- B1.21 x 10^48
- C5.28 × 10^19
9What is the charge of a proton?
- ANeutral
- BPositive
- CNegative
10In a cathode ray tube, where does thermionic emission occur?
- AAt the cathode
- BAt the anode
- CAlong the filament
- DAcross the fluorescent screen
Información
- 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.
- Autor
- alex.examtime9373
- Idioma
- English
- Visitas
- 286
- Etiquetas
- Valoración
- 3,8 de 5 · 4 valoraciones Valora este test