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  • The speed of the electromagnetic wave in a medium if the amplitude of electric and magnetic fields are <img alt="\mathrm{3 \times 10^4 \mathrm{~N} \mathrm{C}^{-1} and \; 2 \times 10^{-4} \mathrm{~T

The speed of the electromagnetic wave in a medium if the amplitude of electric and magnetic fields are \mathrm{3 \times 10^4 \mathrm{~N} \mathrm{C}^{-1} and \; 2 \times 10^{-4} \mathrm{~T}}, respectively.

Option: 1

1.25 \times 10^8 \mathrm{~ms}^{-1}


Option: 2

1.5 \times 10^8 \mathrm{~ms}^{-1}


Option: 3

2 \times 10^8 \mathrm{~ms}^{-1}


Option: 4

2.5 \times 10^8 \mathrm{~ms}^{-1}


Answers (1)

best_answer

The amplitude of the electric field, \mathrm{E_o=3 \times 10^4 \mathrm{~N} \mathrm{C}^{-1}}

The amplitude of the magnetic field, \mathrm{\mathrm{B}_0=2 \times 10^{-4} \mathrm{~T} \text {. }} Therefore, speed of the electromagnetic wave in a medium is

\mathrm{=3 \times 10^4 / 2 \times 10^{-4}=1.5 \times 10^8 \mathrm{~ms}^{-1}}

Posted by

avinash.dongre

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