PTU Important Questions----Theory Of Relativity

       Physics: Important Questions related to chapter --Theory Of Relativity.  2-marks/4-marks Q1. Define frame of reference. Q2. Explain the term time dilation. Q3. Explain the concept of Ether. Q4. Is earth an inertial frame? Explain briefly. Q5. State the postulates of special theory of relativity. Q6. Explain why a particle cannot move faster than velocity of light. Q7. Define (a) Proper Length   (b)...

PTU Important Questions----LASERS

                                   Physics: Important Questions related to chapter --LASERS.  2-marks/4-marks Q1. What is laser? Q2. What is holography? Q3. Explain how a laser light is different from ordinary light? Q4. Explain the terms:       1)Stimulated emission 2) Population Inversion 3) Optical Pumping       4)Stimulated absorption Q5. State any four methods of pumping a laser. Q6. Explain how a hologram differs from phtograph? Q7....

Magnetic Materials & Superconductivity

Physics: Important Questions related to chapter --Magnetic Materials and Superconductivity 2-marks/4-marks Q1. Derive the relation b/w Permeability and Susceptibility. Q2.State and explain the chief origin of magnetic moment for electrons. Q3. State any four characteristics of ferromagnetic materials. Q4. Define 1) Curie Temperature 2) Neel Temperature . Q5. Define 1) Remanence 2) Coericivity . Q6. What are ferrites? State few properties of ferrites....

PTU Important questions--EM Waves and Dielectrics

Physics: Important Questions related to chapter --EM Waves and Dielectrics. 2-marks/4-marks Q1. Define gradient of a scalar field.Give its physical significance. Q2. Define divergence of a vector field.Give its physical significance. Q3. Define curl of a vector field.Give its physical significance. Q4.What are solenoidal, irrotational and conservative fields? Q5. Derive relationship b/w electric field and electric potential. Q6. What is dielectric?Give its types....