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The magnetic field in a plane electromagnetic wave is given by B=(200μT)sin(4.0x1015s−1)(t−x/c) . Find the average energy density corresponding to the electric field.

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a

16x10−3Jm−3

b

8x10−3Jm−3

c

24x10−3Jm−3

d

32x10−3Jm−3

answer is B.

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Detailed Solution

14 B02μo = 14×4×10−84π×10−7 = 8×10−3Jm−3

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The magnetic field in a plane electromagnetic wave is given by B=(200μT)sin(4.0x1015s−1)(t−x/c) . Find the average energy density corresponding to the electric field.