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The electric field of plane electromagnetic wave of amplitude 2V/m varies with time, propagating along z-axis. The average energy density of magnetic field in J/m3 is equal to x×10−12 J/m3. Then ‘x’ value is equal to (∈0=8.854×10−12 F/m)

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answer is 8.85.

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Detailed Solution

For an electro magnetic wave ,Average energy density due to electric field=Average energy density due to magnetic field=14ε0E02=14×8.85×10−12×2×2=8.85×10−12 Joule m−3=x×10−12 Joule m−3 ∴x=8.85

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The electric field of plane electromagnetic wave of amplitude 2V/m varies with time, propagating along z-axis. The average energy density of magnetic field in J/m3 is equal to x×10−12 J/m3. Then ‘x’ value is equal to (∈0=8.854×10−12 F/m)