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If 5% of the energy supplied to a bulb i...

If 5% of the energy supplied to a bulb is irradiated as visible light, how many quanta are emitted per second by a 100 W lamp? (Assume, wavelength of visible light as `5.6xx10^(-5)cm`)

A

`1.4 xx10^19`

B

`3xx10^3`

C

`1.4 xx10^-19`

D

`3xx10^4`

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The correct Answer is:
A
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