Home
Class 12
PHYSICS
A phsicist wishes to eject electrons by ...

A phsicist wishes to eject electrons by shining light on a metal surface. The light of wavelength of 450nm. The table lists the only available metals and their work functions.

Which option corrctly identifies the metal that will produce the most energetic electrons and their energies?

A

Barium only

B

Barium or lithium

C

Lithium, tantalum or tungsten

D

Tungston or tantalum

Text Solution

Verified by Experts

The correct Answer is:
B
`DeltaE=(12400)/(4500Å)`
`DeltaE=2.75eV`.....(1)
for photoelectric effect
`DeltaE gt W_(0)` (Work function).
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • ATOMIC PHYSICS

    RESONANCE ENGLISH|Exercise Exercise -3 part -I JEE (Advanced)|86 Videos

  • ATOMIC PHYSICS

    RESONANCE ENGLISH|Exercise Advanved level problems|17 Videos

  • ATOMIC PHYSICS

    RESONANCE ENGLISH|Exercise Exercise-2 part-III one or more than one options correct type|14 Videos

  • ALTERNATING CURRENT

    RESONANCE ENGLISH|Exercise HIGH LEVEL PROBLEMS|11 Videos

  • CAPACITANCE

    RESONANCE ENGLISH|Exercise High Level Problems|16 Videos

Similar Questions

Explore conceptually related problems

A physicist wishes to eject electrons by shining light on a metal surfac. The light source emits light of wavelenght of 450 nm. The table lists the only available metals and their work functions. {:("Metal",W_(0)(eV)),("Barium",2.5),("Lithium",2.3),("Tantalum",4.2),("Tungsten",4.5):} Which option correctly identifies the metal that will produce the most energetic electrons and their energies?

A physicist wishes to eject electrons by shining light on a metal surface. The light source emits light of wavelength of 450 nm. The table lists the only available metals and their work functions. {:("Metal",W_(0)(eV)),("Barium",2.5),("Lithium",2.3),("Tantalum",4.2),("Tungsten",4.5):} Which metal(s) can be used to produce electrons by the photoelectric effect from given source of light?

Light of wavelength 2000 Å falls on a metallic surface whose work function is 4.21 eV. Calculate the stopping potential

Light of wavelenght 5000 Å fall on a metal surface of work function 1.9 eV Find a. The energy of photon

The threshold wavelength for ejection of electrons from a metal is 450 nm. The work function for the photoelectric emission from the metal is

The threshold wavelength for ejection of electrons from a metal is 430 nm. The work function for the photoelectric emission from the metal is

The threshold wavelength for ejection of electrons from a metal is 330 nm. The work function for the photoelectric emission from the metal is

The threshold wavelength for ejection of electrons from a metal is 350 nm. The work function for the photoelectric emission from the metal is

The threshold wavelength for ejection of electrons from a metal is 280 nm. The work function for the photoelectric emission from the metal is

The threshold wavelength for ejection of electrons from a metal is 650 nm. The work function for the photoelectric emission from the metal is

Home
Profile