NEET UG PHYSICS MCQ: ELECTROMAGNETIC WAVES

1 Medium

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Application +4 | -1

Electric field of plane electromagnetic wave propagating through a non-magnetic medium is given by

E = 20\cos \,(2 \times {10^{10}}t - 200x)\,\,\,V/m.

The dielectric constant of the medium is equal to
(Take,

{\mu _r} = 1)

View answer and explanation

Correct option: A

Option A (9) is correct because the dielectric constant is calculated from the refractive index, which is determined from the wave equation.

More Questions from ELECTROMAGNETIC WAVES

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{E_X}

{E_R}

{E_M}

60\,\,\frac{V}{m}

{E_1} = {E_{01}}\hat x\cos \left[ {2\pi v\left( {\frac{z}{c} - t} \right)} \right]

{E_2} = {E_{02}}\hat x\cos \left[ {k\left( {2z - ct} \right)} \right]

{\varepsilon _{{r_1}}}

{\varepsilon _{{r_2}}}

E = 50\sin \,(500x - 10 \times {10^{10}}t)\,v/m.

c

\mathrm{\varepsilon }

\mathrm{\mu }

\sqrt {\frac{\mathrm{\mu }}{\mathrm{\varepsilon }}}