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In a plane electromagnetic wave propagat...

In a plane electromagnetic wave propagating in + ve y direction, the electric field oscillates sinusoidally at a frequency `2xx10^(10)` Hz and amplitude 48 V/m. The amplitude of oscillating magnetic field will be:

A

`(1)/(16)xx10^(-8) Wb//m^(2)`

B

`16xx10^(-8)wb//m^(2)`

C

`12xx10^(-7) wb//m^(2)`

D

`(1)/(12)xx10^(-7) Wb//m^(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
Oscillating magnetic field
B = `("E")/("C") = (48)/(3xx10^(8)) = 16 xx 10^(-8)) Wb/m^(2)`
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Knowledge Check

  • In a plane e.m. wave the electric field oscillates sinusoidally at a frequency of 2.5 xx 10^(10) Hz and amplitude 480 V/m. The amplitude of oscillating magnetic field will be:

    A
    `1.52 xx 10^(-8) "wb/m"^2`
    B
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    C
    `1.6 xx 10^(-6) "wb/m"^2`
    D
    `1.6 xx 10^(-7) "wb/m"^2`

  • In a place e.m wave, the electric field oscillates sinusoidally at a frequency of 2.5xx10^(10)Hz and amplitude 480 V//m .The amplitude of oscillating magnetic field will be,

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    B
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    A
    `(1)/(16)xx10^(-8)Wb//m^(2)`
    B
    `16xx10^(-8)Wb//m^(2)`
    C
    `12xx10^(-7)Wb//m^(2)`
    D
    `(1)/(12)xx10^(-7)Wb//m^(2)`

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