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Photoelectric effect experiments are performed using three different metal plates p, q and r having work functions $ϕ_{p} = 2.0 e V, ϕ_{q} = 2.5 e V, a n d ϕ_{r} = 3.0 e V$ , ,respectively. A light beam containing wavelengths of 550 nm, 450 nm and 350 nm with equal intensities illuminates each of the plates. The correct I-V graph for the experiment is

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a

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b

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c

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d

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answer is A.

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Photoelectric effect experiments are performed using three different metal plates p, q and r having work functions ϕp=2.0 eV,ϕq=2.5 eV, and ϕr=3.0 eV , ,respectively. A light beam containing wavelengths of 550 nm, 450 nm and 350 nm with equal intensities illuminates each of the plates. The correct I-V graph for the experiment is