Question

Which one of the following television displays is working on the principle of semiconductor?
A. Plasma display
B. Liquid crystal display
C. Light emitting diode display
D. None of the above

Answer 1

Hint: In order to answer this question, we first need to know the basic component which is used in the given types of displays. Out of those components, the one which is made of semiconductor devices will be the required answer to the question.

Complete step-by-step answer:
The basic components of the given displays are as follows:
As it is clear from their names, plasma display uses plasma, liquid crystal display uses liquid crystals in the screen while the light emitting diode display uses the LED.
Now out of these options, LED is a device which is based on semiconductor. A diode is made of a p-type semiconductor and a n-type semiconductor joined with each other. It is called light emitting diode because when the electron and holes recombine with each other in the depletion layer of this diode then the energy is emitted by them in the form of photons. The wavelength of these photons lies in the range of visible light of the electromagnetic spectrum. LEDs act as an efficient source of light and are utilized in constructing displays for televisions.
Hence, the correct answer is option C.

So, the correct answer is “Option C”.

Note: The working of the three types of displays is completely different from each other. The liquid crystal display (LCD) uses a special type of crystal which is in liquid form. The plasma displays tiny sources of light which are made of plasma. The plasma is obtained by heating gases to a very high temperature. Out of all three of these, plasma display is the oldest technology, then we have LCD while the LED displays are the latest technology and better than other two.