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

Related Mcqs:

1. 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

2. Einstein’s photoelectric equation is given by_______________?

   A. 1/2 mvmax2=hf+Φ
   B. 1/2 mvmax2-hf = Φ
   C. 1/2 mvmax2=hf-Φ
   D. All of above are correct

3. Photoelectric effect was given by ____________________?

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

4. Reverse process of photoelectric effect is_______________?

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

5. 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

6. When a pure inductor of inductance L and a pure capacitor of capacitance C are connected in parallel to a sinusoidal potential difference V the potential difference across both L & C will be_______________?

   A. Same
   B. Different
   C. At L will be more than at C
   D. At L will be less than at C

7. 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

8. If n number of the photon is striking on a metal surface then total momentum exerted is_______________?

   A. p
   B. n
   C. 0
   D. None

9. Ina liquid metal fast breeder reactor, the type of uranium used is______________?

   A. 92U235
   B. 92U238
   C. 92U234
   D. 92U239

10. Two identical metal balls with charges + 2Q and – Q are separated by some distance, and exert a force F on each other. They are joined by a conducting wire, which is then removed. The force between them will now be_________?

    A. F
    B. F/2
    C. F/4
    D. F/8

    Submitted by: Tauseef Ali