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SrO (strontium oxide) is coated on tungs...

SrO (strontium oxide) is coated on tungsten for thermionic emission in values because :

A

it can be heated up to high temperature

B

its work function is less

C

its work function is more

D

it maintains the cathode

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The correct Answer is:
B
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MODERN PUBLICATION-SOLIDS & SEMICONDUCTOR DEVICES-Revision Test
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  3. Choose the reverse biased p-n junction :

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  4. The forward biased characteristics of a p - n junction are :

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  5. If Ie is emitter current , Ib is base current and Ic is the collector ...

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  6. Zener diode is :

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  7. The reverse biased characteristics of a p-n junction are :

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  10. At abosolute zero, a metal will behave as :

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  12. One speaks of mutual characteristics in connection with L :

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