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Standard VII
Physics
Electrical Resistance
Give reason w...
Question
Give reason why an electron emitter is generally made up of tungsten coated with cesium oxide.
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Solution
Its work function is low of 1 eV and needs to be heated up to only 1000 K to emit good quality of electrons.
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Fill in the blanks :
The ................................ of tungsten is reduced by coating with barium oxide.
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