A. pair production
B. Compton effect
C. annihilation of matter
D. X-rays production
Related Mcqs:
- Photoelectric effect was given by ____________________?
A. Hertz
B. Fresnel
C. Einstein
D. Plank - 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 - 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 - 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 - Which of the following is reverse process of composition of vectors?
A. Addition of vectors
B. Subtraction of vectors
C. Multiplication of vectors
D. Resolution of vectorsSubmitted by: Zahid Jagirani
- In cricket when a bowler produce reverse swing the ball will move towards______________?
A.The shinning side of the ball
B. Rough side
C. The seam of the ball
D. Goes straight - The reverse of LED is______?
A. Diode
B. Resistor
C. Photodiode
D. CapacitorSubmitted by: Raza Baloch
- 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 - Doppler effect applies to____________________?
A. sound wave only
B. light wave only
C. both sound and light waves
D. neither sound nor light wave - Joule Thomson effect is based upon __________ ?
A. Sudden compression of gases
B. Sudden expansion of gases
C. Cooling of gases
D. Heating of gasesSubmitted by: Rashid Mehmood
