In photodiode, the bias voltage is applied in bias form:
Correct answer: A. Reverse bias
- A. Reverse bias
- B. Forward bias
- C. No bias
- D. Zener bias
Explanation
This is the correct answer. Photodiodes are typically operated in reverse bias mode. This means that an external voltage is applied to the photodiode in such a way that it opposes the natural flow of current through the PN junction. When light strikes the photodiode, it generates electron-hole pairs, which are then swept away by the electric field created by the reverse bias voltage, producing a photocurrent.
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Classical physics cannot explain blackbody radiation and related observations, leading to Planck’s quantum theory, in which energy is emitted or absorbed in discrete packets. Photons provide the particle model of light, with energy and momentum linked to frequency and wavelength, including the photoelectric effect and its threshold frequency.
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