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In an electromagnetic wave in free space...

In an electromagnetic wave in free space the root mean square value of the electric field is `E_(rms)=6 V//m`. The peak value of the magnetic field is

A

`1.41 x 10^(-8) T`

B

`2.83 xx 10^(-8) T`

C

`0.70 xx 10^(-8) T`

D

`4.23 xx 10^(-8) T`

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • In an electromagnetic wave in free space the root means the value of electric field is E_("mn") = 6 "V/m" . The peak value is the magnetic field is:

    A
    `2. 83 xx 10^(-6)` T
    B
    `0.70 xx 10^(-6)` T
    C
    `4.23 xx 10^(-6)` T
    D
    `1.41 xx 10^(-8)` T

  • A plane electromagenic wave having a frequency v= 23.9 GHz propagates along the positive z-direction in free space. The peak value of the Electric field is 60 V//m Which among the following is the acceptable magnetic field component in the electromagnetic wave ?

    A
    `vec(B)=2 xx 10^(7)sin(0.5 xx10^(3) z+1.5 xx 10^(11) t)hat(i)`
    B
    `vec(B)=2xx 10^(-7)sin(0.5 xx10^(3)z-1.5 xx 10^(11)t)hat(i)`
    C
    `vec(B)=60 sin(0.5 xx 10^(3) x+1.5 xx10^(11)t)hat(k)`
    D
    `vec(B)=2 xx 10^(-7)sin(1.5 xx 10^(2) x+0.5 xx10^(11) t)hat(j)`

  • In electromagnetic waves, the phase difference between magnetic and electric field vectors is

    A
    zero
    B
    `pi`
    C
    `pi//2`
    D
    `pi//4`

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