Two metallic plates A and B , each of area $$5$$×$$10-4$$ $$m2$$, are placed parallel to each other at a separation of $$1$$ cm . Plate B carries positive charge of $$33.7$$×$$10-12C$$. A $$mono-chromatic$$ beam of light, with photons of energy $$5$$ eV each, starts falling on plate A at $$t=0$$ so that $$1016$$ photons fall on it per square meter per second. Assume that one photoelectron is emitted for every $$106$$ incident photons. Also assume that all the emitted photoelectrons are collected by plate B and the work function of plate A remains constant at the value $$2$$ eV. No. of photoelectrons emitted up to $$10$$ $$sec$$

Question

Two metallic plates A and B , each of area $$5$$×$$10-4$$ $$m2$$, are placed parallel to each other at a separation of $$1$$ cm . Plate B carries positive charge of $$33.7$$×$$10-12C$$. A $$mono-chromatic$$ beam of light, with photons of energy $$5$$ eV each, starts falling on plate A at $$t=0$$ so that $$1016$$ photons fall on it per square meter per second. Assume that one photoelectron is emitted for every $$106$$ incident photons. Also assume that all the emitted photoelectrons are collected by plate B and the work function of plate A remains constant at the value $$2$$ eV. No. of photoelectrons emitted up to $$10$$ $$sec$$

Infinity Learn · Accepted Answer

Number of electrons falling on the metal plate $$A=1016$$×$$5$$×$$10-4$$∴ Number of photoelectrons emitted from metal plate A upto $$10$$ seconds $$isne=5$$×$$10-4$$×$$1016106$$×$$10=5$$×$$107$$

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