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An electric bulb of 314 watt is at a dis...

An electric bulb of 314 watt is at a distance of 10cm from a point. If the efficiency of bulb is 50% then intensity at that point is

A

`1.25×10^3 W/m^2`

B

`2.25×10^3 W/m^2`

C

`2.50×10^3 W/m^2`

D

`5×10^3 W/m^2`

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