An electromagnetic wave has an electric field given by the expression (in Cartesian co-ordinates) :...

Audrina Graham

Audrina Graham

Answered

2022-12-28

An electromagnetic wave has an electric field given by the expression (in Cartesian co-ordinates) : E ( x , t ) = 6.0 cos ( 1.4 × 10 7 x 3.43 × 10 15 t ) z ^ . What is the direction of the magnetic field at time t = 0 and position x = 0 ?
A. -x
B. +x
C. -y
D. +y

Answer & Explanation

Collin Johns

Collin Johns

Expert

2022-12-29Added 9 answers

E × B | | V
where V is a representation of the direction of propagation.
Given that wave is propagating along + x-axis and E along z-axis.
Therefore E × B = + i ^
k ^ × B = + i ^ B is along j ^

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