Promote Physics

Leave a comment

Chap18: The Atomic Spectra

Chap 18 (Handout#1) – Bohr’s radius, energy, wavelength and Hydrogen Spectrum

Chap 18 (Handout#2) – X-Rays and LASER



Leave a comment

Chap#17 Advent of Modern Physics

Chapter 17

Important Questions

One more question:

What is meant by the term frame of reference? Prove that all the laws of mechanics are the same for all the inertial frame of references. (Chapter 17) (Model Question Paper, 2017)

Leave a comment

Model Paper MCQs Solution

  1. A_y=Acos\theta
  2. cannot be replaced by a single equivalent force
  3. less force is needed by the user
  4. remain in the spacecraft
  5. the height and the time of fall
  6. the total K.E after impact is   mv^2
  7. The total energy of the ball is constant throughtout the motion
  8. Polarization
  9. The limiting friction is less than the required centripetal force
  10. Longitudinal and Stationary
  11. Wavelength of sound is greater than that of light waves
  12. The amplitude of oscillations gradually decreases
  13. produce the state of stable equilibrium
  14. a monochromatic source of red light be used
  15. very short focal length and converging properties
  16. has a definite quality
  17. it is constant but not zero