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Which one of the following metals is used in the filaments of photo-electric cells that convert light energy into electric energy? |
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(a) |
Tungsten |
(b) |
Copper |
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(c) |
Rubidium |
(d) |
Aluminium |
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Which one of the following metals is used in the filaments of photo-electric cells that convert light energy into electric energy? |
|
|||
|
(a) |
Tungsten |
(b) |
Copper |
|
|
(c) |
Rubidium |
(d) |
Aluminium |
|