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. How a dielectric is different from an insulator?
Q7. Define dielectric medium and dielectric strength.
Q8. Explain the behavior of dielectric in external electric field.
Q9. Define polarization.

Q10. Define Poynting vector.
Q11. State Maxwell's equations and give their significance.
Q12.What are Em waves? Give their basic characteristics.
Q13. Derive the relation b/w dielectric constant and electric susceptibility.
Q14.Write short note on production of em waves.
Q15.Why light is characterized as electric vector, although it also possesses some
         magnetic vector.
Q16. What do you understand by displacement current?
Q17. Define electric susceptibility.

6-marks/8-marks

Q1. Derive wave equation for em wave in free space and show that em wave travels
       with speed of light.
Q2. "Maxwell equations are reformulation of existing laws." comment and
        justify your answer.

or

        Derive the relations for Maxwell's equation.

Q3. (a )What is polarization? What are its various types?Explain in detail.
       (b) Derive Maxwell equation as modified form of Ampere's law.




Important questions related to chapter Magnetic materials and superconductivity .
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