Einstein’s photoelectric equation is given by_______________?

Related Mcqs:

1. The synopsis of Einstein’s equation E = mc² is that

   A. The faster you move, the lighter you get
   B. The faster you move, the heavier you get
   C. The slower you move, the heavier you get
   D. None of the above

   Submitted by: Rizwan Ayub Saadi

2. Photoelectric effect was given by ____________________?

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

3. 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

4. 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_______________?

   A. Becomes double
   B. Remains same
   C. Becomes half
   D. First increases then decrease because of the curvilinear graph

5. Reverse process of photoelectric effect is_______________?

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

6. According to Einstein light travels form one place to another in the form of ________________?

   A. waves
   B. particles
   C. photons
   D. it was not his discovery

7. According to Einstein, the gravitational interaction is possible between_______________?

   A. material objects only
   B. material objects and electromagnetic radiation only
   C. electromagnetic radiations
   D. none of the above

8. The equation θ = 1.22 λ/D was devised by_______________?

   A. Newton
   B. Einstein
   C. Raleigh
   D. Planks

9. An alternating current is represented by the equation I = I∫sinπt which of the following equation represents an alternating current of frequency and amplitude twice that of the above current ?

   A. I = 2I∫Sin(πt/2)
   B. I = 2I∫Sin(2πt)
   C. I = 2ISinπt
   D. I = I∫sin(2πt)

10. The relativistic energy E is equivalent to relativistic mass given by_______________?

    A. Ec2
    B. E/c2
    C. E/c
    D. c2/E