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A tungsten emitter works at 2500 K. To i...

A tungsten emitter works at 2500 K. To increase the emission current density by 20%, how much change in the work function is required (Given, log2=0.3, log 3= 0.477)

A

0.016 eV

B

0.039 eV

C

2.54 eV

D

0.254 eV

Text Solution

Verified by Experts

The correct Answer is:
B
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