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- Electrical Engineering Materialselectrical-engineering-mcqs › electrical-engineering-materials
- Published
- 22 Dec 2018
- Last updated
- 28 May 2026
Explanation
The photoelectric effect depends on the frequency of the incident light. Only when the light's frequency is above a certain threshold can electrons be emitted from the material. Intensity or brightness affects the number of emitted electrons but not the occurrence of the effect itself.
More Electrical Engineering Materials MCQs
Practice related questions from the same subject.
- 1.Which factor primarily influences the concentration of minority carriers?
- 2.How does the electron current in the conduction band compare to the hole current in the valence band?
- 3.What is the band gap energy of germanium?
- 4.Which type of element, containing three valence electrons, is commonly used as a dopant in semiconductors?
- 5.Which material contains the lowest proportion of carbon?
- 6.How does the electrical conductivity of an extrinsic semiconductor change as the temperature rises?
- 7.Which of the following statements about holes is incorrect?
- 8.If the Hall coefficient of a substance is measured to be zero, what type of material is it most likely?
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