Question

The transducer used in television transmission works on the principle of

• A. Electromagnetic induction
• B. Photoelectric effect
• C. Raman's effect
• D. Rayleigh's effect

Answer 1

Answer: (B)

Photoelectric effect

A transducer is an electronic device that converts light energy to electrical energy in television. When light falls on photosensitive element electric current is generated that is measured directly or after amplification. Similarly, photoelectric effect is the ejection of electrons from a metal or semiconductor surface when illuminated by light or any radiation of suitable wavelength.