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The electric field intensity produced by...

The electric field intensity produced by the radiations coming from 100W bulb at a 3m distance is E. The electric field intensity produced by the radiations coming from 50W bulb at the same distance is…….

A

`E/2`

B

2E

C

`E/sqrt2`

D

`sqrt2 E`

Text Solution

Verified by Experts

The correct Answer is:
A
`I=P/A=P/(4pir^2)`
`therefore I prop P` (Here r is constant)
`therefore I_1/I_2=P_1/P_2 implies E_1/E_2=100/50 implies I_2=E/2`
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