Physics Multiple Choices Questions PPSC

Physics Multiple Choices Questions PPSC

1. Due to the relative motion of the observer and frame of the reference time is …
A. Constant
B. Uniform
C. Contracts
D. Dilates
E. None of these

2. Rest mass energy of an electron is …
A. 1.02 MeV
B. 0.422 KeV
C. 2.02 MeV
D. 0.511 MeV
E. None of these

3. According to the theory of relative mass of an object is …
A. depends on particles
B. volume of an object
C. speed of light
D. area of an object
E. None of these

4. Which phenomenon is best explained by the particle nature of light?
A. The photoelectric effect
B. Polarization
C. The Doppler Effect
D. Interference
E. None of these

5. Which color of light has the greatest energy per photon?
A. violet
B. green
C. blue
D. both A & B
E. None of these

6. An infinite mass would require an infinite_________ to accelerate it.
A. Energy
B. Light
C. Power
D. Force
E. None of these

7. The Compton effect confirms:
A. Wave nature of light

8. Elementary particles are the basic building blocks for which of the followings?
A. Solids
B. Liquids
C. Gases
D. Matter
E. None of these

9. At constant pressure, the graph between V and T is?
A. Straight line
B. Parabola
C. Hyperbola
D. Ellipse
E. None of these

10. An isothermal process is carried out at constant …?
A. Energy
B. Volume
C. Temperature
D. Pressure
E. None of these

11. The polarization of light shows that light waves are …… in nature.
A. Traverse
B. Longitudinal
C. None of these
D. Both A & B
E. None of these

12. Bend of light rays or image in a denser medium is commonly called …?
A. Refraction
B. Reflection
C. Transpiration
D. Operation
E. None of these