The electric vector of an electromagnetic wave in vacuum is represented by 
. The frequency of the wave is 20 MHz and it is propagating along the positive z-direction. At this point magnetic vector is
A
–2.1 × 10 –8 
T
T
B
+2.1 × 10 –8 
T
T
C
+ 4.0 × 10 –8 
T
T
D
–18.9 × 10 –8 
T
T
Text Solution
Verified by ExpertsThe correct answer is:
A
(v/m) and f = 20 MHz
direction of propagation = 
|| 
then 
= 2.1 × 10 –8 T (– 
)
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