The electric field intensity is produced by the radiation coming from a 100   W bulb at a distance of 3…

The electric field intensity is produced by the radiation coming from a 100 W bulb at a distance of 3 m is E. The electric field intensity produced by the radiation coming from 60 W at the same distance is x5E. Where the value of x=_________ .

Solution

cε0E2=1004π×32

⇒cε0x5E2=604π×32

⇒x5=35

⇒x=3

Asked in: JEE Main 2021 (17 Mar Shift 2)

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