Single Choice

An oxide coated filament is useful in vacuum tubes because essentially

AIt has high melting point
BIt can withstand high temperatures
CIt has good machanical strength
DIt can emit electrons at relatively lower temperatures
Correct Answer

Solution

An oxide coated filament is useful in vacuum tubes because essentially because it can emit electrons at relatively lower temperatures.

SIMILAR QUESTIONS

Modern Physics

X-rays, gamma rays and microwaves travelling in vacuum have

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