JEE Main On 8 April 2017 Question 18
Question: The maximum velocity of the photoelectrons emitted from the surface is v when light of frequency n falls on a metal surface. If the incident frequency is increased to 3n, the maximum velocity of the ejected photoelectrons will be - [JEE Online 08-04-2017]
Options:
A) more than $ \sqrt{3}v $
B) equal to $ \sqrt{3}v $
C) $ v $
D) less than $ \sqrt{3}v $
Show Answer
Answer:
Correct Answer: B
Solution:
- $ E _1=hn-\phi $ $ E _2=4hn-\phi $ $ E _2=3(E _1+\phi )-\phi $ $ E _2=3E _1+2V $ $ m _0x\sqrt{3}y $
