Due to presence of an em-wave whose electric component is given by 
, a cylinder of length 200 cm holds certain amount of em-energy inside it. If another cylinder of same length but half diameter than previous one holds same amount of em-energy, the magnitude of the electric field of the corresponding em-wave should be modified as
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Energy density of an 
, whare 
is the amplitude of the wave.
Since total energy is same for both cylinders
or 
The amplitude of corresponding 
wave is 200 N/C
or the wave is 
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