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The electric field in an electromagnetic wave is given by \(\vec{E}=\overset{^}{i}40\cos \omega (t-z/c)N{C}^{-1}\). The …

Q1

The electric field in an electromagnetic wave is given by \(\vec{E}=\overset{^}{i}40\cos \omega (t-z/c)N{C}^{-1}\). The magnetic field induction of this wave is (in SI unit) :

a

\(\vec{B}=\overset{^}{k}\frac{40}{c}\cos \omega (t-z/c)\)

b

\(\vec{B}=\overset{^}{j}40\cos \omega (t-z/c)\)

c

\(\vec{B}=\overset{^}{j}\frac{40}{c}\cos \omega (t-z/c)\)

d

\(\vec{B}=\overset{^}{i}\frac{40}{c}\cos \omega (t-z/c)\)

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