In a region of free space the electric field at some instant of time is E⇀$$=80i$$∧$$+32j$$∧$$-64k$$∧$$V/m$$ and the magnetic field is B⇀$$=0.2i$$∧$$+0.08j$$∧$$-0.29k$$∧μT. The pointing vector for these fields is

Correct option is 411.52i∧-28.8j∧

Questions

In a region of free space the electric field at some instant of time is $\overset{⇀}{E} = (80 \overset{\land}{i} + 32 \overset{\land}{j} - 64 \overset{\land}{k}) V / m$ and the magnetic field is $\overset{⇀}{B} = (0.2 \overset{\land}{i} + 0.08 \overset{\land}{j} - 0.29 \overset{\land}{k}) μ T$ . The pointing vector for these fields is

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-11.52i∧+28.8j∧

-28.8i∧+11.52j∧

28.8i∧-11.52j∧

11.52i∧-28.8j∧

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detailed solution

Correct option is D

The pointing vector S⇀=1μ0E⇀×B⇀=14π×10-7i∧j∧k∧8032-640.20.080.29=11.52i∧-28.8j∧

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In a region of free space the electric field at some instant of time is E⇀=80i∧+32j∧-64k∧V/m and the magnetic field is B⇀=0.2i∧+0.08j∧-0.29k∧μT. The pointing vector for these fields is

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