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11.Dual Nature of Radiation and matter
easy
An oxide coated filament is useful in vacuum tubes because essentially
A
It has high melting point
B
It can withstand high temperatures
C
It has good machanical strength
D
It can emit electrons at relatively lower temperatures
Solution
(d) An oxide coated filament is useful in vaccum tubes because essentially, it can emit electrons of relatively lower temperatures.
Standard 12
Physics
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