Question 10: EM waves

Question

A plane electromagnetic wave of frequency $$20 \mathrm{~MHz}$$ travels through a space along $$x$$-direction. If the electric field vector at a certain point in space is $$6 \mathrm{~Vm}^{-1}$$, then what is the magnetic field vector at that point?

Accepted Answer

Magnetic field,
$$\begin{gathered}
B=\frac{E}{c}, 	ext { where } c=3 	imes 10^8 \mathrm{~m} / \mathrm{s} . \
B=\frac{6}{3 	imes 10^8}= 2 	imes 10^{-8} \mathrm{~T}
\end{gathered}$$

Answer

$$2 	imes 10^{-8} \mathrm{~T}$$

Answer

$$\frac{1}{2} 	imes 10^{-8} \mathrm{~T}$$

Answer

$$2 \mathrm{~T}$$

Answer

$$\frac{1}{2} \mathrm{~T}$$

EM waves

A plane electromagnetic wave of frequency $20 \mathrm{~MHz} travels through a space along x-direction. If the electric field vector at a certain point in space is 6 \mathrm{~Vm}^{-1}$, then what is the magnetic field vector at that point?

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