A tungsten wire of unknown composition emits 0. 1 ampere per centimetre square at a temperature of 1900 Kelvin. Find the work function

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A tungsten wire of unknown composition emits 0. 1 ampere per centimetre square at a temperature of 1900 Kelvin. Find the work function

Shaikh Junaid 8th Dec, 2018

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Answer (1)

Karthikeyan 9th Dec, 2018

Hi

You can calculate this work function by using

Richardson- dushman equation ,

Consider J=0.1 , A= 60.2 , T= 1900

b=11600*pi ,

Work function

J= A* T^2 * e ^ b/ T

By the above consider values you can calculate the pi value .

Which is the work function .

Answer will be 3.56 eV

Thanks

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Shaikh Junaid

14th Dec, 2018

Thanks sir

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