(Solution) - A photoelectric current emerging in the circuit of a vacuum -(2025 Original AI-Free Solution)

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Academic Level: Undergrad. (yrs 3-4)

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A photoelectric current emerging in the circuit of a vacuum photocell when its zinc electrode is subjected to electromagnetic radiation of wavelength 262 nm is cancelled if an external decelerating voltage 1.5 V is applied. Find the magnitude and polarity of the outer contact potential difference of the given photocell.