(ii) Which of these does not use a magnet?
(a) LCD TV
(b) electric fan
(c) computer hard disk
(d) DVD
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Answer:
LCD TV, electric fan , computer hard disk , DVD. A simple DVD would not consist of any magnetic material all other appliances would. computer hard disk does not use magnet.
Explanation:
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a) LCD TV.
- Most LCD TV uses liquid pixels to form images, the full form of LCD is also liquid crystals display
- It has a backlighting component.
- It is made by assembling a sandwich of two sheets of polarizing materials
- It consumes very less electricity as compared to plasma TV
- It uses either a passive or active matrix display grid.
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