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
Related Mcqs:
- 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 - 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 - Photoelectric effect was given by ____________________?
A. Hertz
B. Fresnel
C. Einstein
D. Plank - Reverse process of photoelectric effect is_______________?
A. pair production
B. Compton effect
C. annihilation of matter
D. X-rays production - 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 - 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 - 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 - 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 - Ina liquid metal fast breeder reactor, the type of uranium used is______________?
A. 92U235
B. 92U238
C. 92U234
D. 92U239 - 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/8Submitted by: Tauseef Ali
