Photoelectric effect experiments are performed using three different metal plates \( p, q \) and...

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Photoelectric effect experiments are performed using three different metal plates \( p, q \) and \( r \) having work functions \( \phi_{p}=2.0 \mathrm{~eV}, \phi_{q}=2.5 \mathrm{~eV} \) and \( \phi_{r}=3.0 \mathrm{~eV} \), respectively. A light beam containing wavelengths of \( 550 \mathrm{~nm}, 450 \mathrm{~nm} \) and 350 \( \mathrm{~nm} \) with equal intensities illuminates each of the plates. The correct \( I-V \) graph for the experiment is
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(b) img src=https://penpencil-static-content.s3.ap-south-1.amazonaws.com/5eb393ee95fab7468a79d189/6mmsrr83rhthbpbcfv83pdifi.png width=123 height=84 /
(c) img src=https://penpencil-static-content.s3.ap-south-1.amazonaws.com/5eb393ee95fab7468a79d189/5zyks0omm1i7jejhxsihezdet.png width=122 height=111 /
(d) img src=https://penpencil-static-content.s3.ap-south-1.amazonaws.com/5eb393ee95fab7468a79d189/qnbf1nbyeu2bezg6qz0cs18ko.png width=137 height=97 /
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