Home
Class 12
PHYSICS
Five elements A , B , C , D and E have w...

Five elements `A , B , C , D` and `E` have work functions `1.2 eV , 2.4 eV , 3.6 eV , 4.8 eV` and `6 eV` respectively . If light of wavelength `4000 Å` is allowed to fall on these elements , then photoelectrons are emitted by

A

A,B and C

B

A,B,C,D and E

C

A and B

D

Only E

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • ELECTRON,PHONTS,PHOTOELECTRIC EFFECT & X-RAYS

    CENGAGE PHYSICS|Exercise dpp 3.3|15 Videos

  • ELECTRON,PHONTS,PHOTOELECTRIC EFFECT & X-RAYS

    CENGAGE PHYSICS|Exercise multiple correct|1 Videos

  • ELECTROMAGNETIC INDUCTION

    CENGAGE PHYSICS|Exercise compression type|7 Videos

  • Electrostatic Potential and Capacitance

    CENGAGE PHYSICS|Exercise QUESTION BANK|23 Videos

Similar Questions

Explore conceptually related problems

Sodium and copper have work functions 2.3 eV and 4.5 eV respectively . Then the ratio of the wavelength is nearest

Two metals A and B have work functions 4 eV and 10 eV respectively. Which metal has higher threshold wavelength?

Sodium and copper have work functions 2.3 eV and 4.6 eV respectively . Then the ratio of threshold wavelengths are respectively.

Four elements A, B, C, D have work function 2, 2.4, 2.8, 3.2 eV. Light of wavelength 4000 Å is incident on them. The elements which emit photo electrons are

Work functions for metals A and B are 2 eV and 4 eV respectively. Which metal has a lower threshold wavelength and why ?

Light of waelength 4000Å is incident on a metal plate with work function 2eV. The max. K.E. of the photoelectrons is

Work function of tungsten and sodium are 4.4 eV and 2.3 eV respectively . If threshold wavelength of sodium is 5460 Å , then the threshold wavelength of tungsten is

The work function for Al, K and is 4.28 eV, 2.30 eV and 5.65 eV respectively. Their respective threshold frequencies would be