MCQ
Photo-electric cell is not used in:
- ATelevision.
- BPhotography.
- CReproduction of sound in cinema.
- DAutomatic switching of street lightening circuits.
Explanation:
The exposure meter instead of photo electric cell is used in camera to know the correct time of exposure.
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$M{e_3}SiCl\xrightarrow{{{H_2}O}}A$
$M{e_3}SiCl_2\xrightarrow{{{H_2}O}}B$
$MeSiCl_3\xrightarrow{{{H_2}O}}C$
$(A), (B)$ and $(C)$ are known as ____,____, and ____ respectively in silicones formation
[Given: The threshold frequency of platinum is $1.3$ $\times 10^{15} \,s ^{-1}$ and $h =6.6 \times 10^{-34} \,J \,s$.]