IIT JEE Questions And Answers :: Electrons And Dual Nature Of Matter And Radiations: part1



IIT JEE : Electrons And Dual Nature Of Matter And Radiations QUESTIONS AND ANSWERS :: part1 : 11 to 15

Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2024 examinations :

11.It kinetic energy of the emitted electted electrons is zero for the incident light of wavelength 686 nm. Then wavelength of radiations emitting electrons having energy 1.81 eV will be (Given : work function of cesium = 1.81 eV)

686 nm
1372 nm
343 nm
2058 nm

12.Charge on a stationary oil drop in Millikan s experiment is ne. Potential difference between the plates is 400 volts. If mass of the drop is doubled without changing the charge, then potential drop required to keep the drop stationary is

200 volts
800 volts
1600 volts
3200 volts

13.Photon A has twice the wavelength of photon B, then energy of photon A is

Half that of B
Twice that of B
Thrice that of B
Four times that of B

14.Work function of aluminium is 4.2 eV. If two photons each of energy 3.5 eV strike an electron of aluminum, then emission of electron

will be possible
depends on the smoothness of the surface
will not be possible
None of these

15.When a monochromatic point source of light is at a distance of 0.2 m from photoelectric cell, the cut-off voltage and the saturation current are 0.6 V and 18.0 mA respectively. If the same source is placed 0.6 m away from the photo cell, then

the stopping potential will be 0.2 V
the stopping potential will be 0.6 V
the saturation current will be 2.0 mA
the saturation current will be 6.0 mA

More Electrons And Dual Nature Of Matter And Radiations QUESTIONS AND ANSWERS available in next pages

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