Question 110: EM waves

Question

A plane electromagnetic wave of frequency 100 MHz is travelling in vacuum along the x-direction. At a particular point in space and time, $$\overrightarrow B  = 2.0 	imes {10^{ - 8}}\widehat kT$$. (where, $$\widehat k$$ is unit vector along z-direction) What is $$\overrightarrow E $$ at this point?

Accepted Answer

f = 100 MHz
$$\overrightarrow B  = 2 	imes {10^{ - 8}}T$$
$$\overrightarrow E  = \overrightarrow B  	imes \overrightarrow V $$
$$ = (2 	imes {10^8}\widehat k) 	imes (3 	imes {10^8}\widehat i)$$
$$ = 6(\widehat k 	imes \widehat i) = 6\widehat j$$ V/m
$$ \Rightarrow $$ $$\overrightarrow E  = 6\widehat j$$ V/m

Answer

0.6 $$\widehat j$$ V/m

Answer

6.0 $$\widehat k$$ V/m

Answer

6.0 $$\widehat j$$ V/m

Answer

0.6 $$\widehat k$$ V/m

EM waves

A plane electromagnetic wave of frequency 100 MHz is travelling in vacuum along the x-direction. At a particular point in space and time, $\overrightarrow B = 2.0 \times {10^{ - 8}}\widehat kT. (where, \widehat k is unit vector along z-direction) What is \overrightarrow E $ at this point?

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