JEE Previous Year Question
When light of frequency twice the threshold frequency is incident on the metal plate, the maximum velocity of emitted election is . When the frequency of incident radiation is increased to five times the threshold value, the maximum velocity of emitted electron becomes . If = , the value of x will be______.
Topic: JEE PYQ
Answer: 2. Full step-by-step solution below.
Correct answer: 2
Solution
(2)…..(1)
….(2)
More Dual Nature of Matter & Radiation PYQs
- If the wavelength of the first member of Lyman series of hydrogen is . The wavelength of the second member will be
- When a metal surface is illuminated by light of wavelength , the stopping potential is . When the same surf…
- A proton and an electron are associated with same de-Broglie wavelength. The ratio of their kinetic energies is: (Assume…
- When light of wavelength 300 nm (nanometer) falls on a photoelectric emitter, photoelectrons are liberated. For another emitter, h…
- A charged particle is accelerated from rest through a certain potential difference. The de-Broglie wavelength is …