In a photoelectric effect monochromatic light is incident on a metal surface. If the incident light of twice the intensity but of same wavelength the kinetic energy of the emitted electron_______________?

Related Mcqs:

1. In an X-ray tube electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is_______________?

   A. he/ev
   B. he/Vc
   C. eV/h
   D. impossible to predict

2. Stopping potential for a metal surface in case of photoelectric emission depends on_____________?

   A. the threshold frequency for the metal surface
   B. the intensity of incident light
   C. the frequency of incident light and work function of the metal surface
   D. all of the above

3. If the momentum of an object is increased twice, then what will be the kinetic energy?

   A. Twice
   B. Thrice
   C. Four times 
   D. Sixteen times

   Submitted by: Imran Ali Mirbahar

4. Which one of the following is nearly monochromatic light ?

   A. light form fluorescent tube
   B. light form neon lamp
   C. light form sodium lamp
   D. light form simple lamp

5. In monochromatic red light a blue book will probably appear to be_________________?

   A. black
   B. purple
   C. green
   D. no scientific reasoning available

6. Photoelectric effect was given by ____________________?

   A. Hertz
   B. Fresnel
   C. Einstein
   D. Plank

7. Reverse process of photoelectric effect is_______________?

   A. pair production
   B. Compton effect
   C. annihilation of matter
   D. X-rays production

8. If the wavelength of incident radiation is increased in photoemission then_________________?

   A. The maximum kinetic energy of the photoelectrons increases
   B. The minimum kinetic energy of the photoelectrons decreases
   C. The minimum kinetic energy of the photoelectrons increases
   D. The average kinetic energy of the photoelectrons decreases

9. In normal state of energy the incident high energy photons will be______________?

   A. Stimulated
   B. Absorbed
   C. Cause X-ray emission
   D. Cause laser production

10. A transmitting station emits radio waves of wavelength λ at power P. If h is Planck’s constant & c the speed of light what is the rate of emission of photons ?

    A. λ
    B. Speed of sound
    C. Speed of lightB.
    D. h