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In a region of free space the electric a...

In a region of free space the electric at some instant of time to `vecE=(80hati+32hatj-64hatk)` and the magnetic field is `vecB=(0.2hati+0.08hatj-0.29hatk)mu` T. The pointing vector for these field is:

A

`-11.52hati+28.8hatj`

B

`-28.8hati+11.52hatj`

C

`28.8hatj-11.52hatj`

D

`11.52hati-28.8hatj`

Text Solution

Verified by Experts

The correct Answer is:
D
The pointing vector `vecS=(1)/mu_(0)(vecExxvecB)`
`(1)/(4pixx10^(-7))|[hati,hatj,hatk],[80,32,-64],[0.2,0.08,0.29]|=11.52hati-28.8hatj`
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