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A tube emits light of wavelength 5296 Å...

A tube emits light of wavelength 5296 `Å`. The bulb is rated as 200 watt and `20%` of the enrgy is converted into light . If the whole light emitted is allowed to fall on a metal surface having work function `3.00 xx 10^(-19)J` calculate the no. of electrons ejected in 10s.

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`10698 xx 10^(17)` electron
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