A beam of light of wavelength $400 ext{ nm}$ and power $1.55 ext{ mW}$ is directed at the cathode of a photoelectric cell. If only 10% of the incident photons effectively produce photoelectrons, the

Question

A beam of light of wavelength $400	ext{ nm}$ and power $1.55	ext{ mW}$ is directed at the cathode of a photoelectric cell. If only 10% of the incident photons effectively produce photoelectrons, then find current due to these electrons.[Given: $hc = 1240	ext{ eV-nm}$, $e = 1.6 	imes 10^{-19}	ext{ C}$]

Accepted Answer

$50\ \mu	ext{A}$

Answer

$5\ \mu	ext{A}$

Answer

$40\ \mu	ext{A}$

Answer

$114\ \mu	ext{A}$

AIIMS 2015 Physics Distance Calculation MCQ Question

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