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PhysicsNEET 2022Displacement current and Maxwell's equations (qualitative)

Electromagnetic Waves

When light propagates through a material medium of relative permittivity εr\varepsilon_r and relative permeability μr\mu_r, the velocity of light vv is given by (cc = velocity of light in vacuum):

  1. A.v=cεrμrv = \dfrac{c}{\sqrt{\varepsilon_r \mu_r}}✓
  2. B.v=cv = c
  3. C.v=μrεrv = \sqrt{\dfrac{\mu_r}{\varepsilon_r}}
  4. D.v=εrμrv = \sqrt{\dfrac{\varepsilon_r}{\mu_r}}

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