In the photoelectric effect experiment

PHYSICS · Single correct · CBSE · Physics · Dual Nature of Radiation and Matter · Dual Nature of Radiation and Matter

Problem

4. In the photoelectric effect experiment, a stopping potential of Vstop V_{\text {stop }} is needed when light of frequency fo\mathrm{f}_{\mathrm{o}} shines on the electron-emitting metal surface. If the metal surface on which the light shines is replaced with a new material that has half the work function, what is the new stopping potential, Vnew V_{\text {new }}, for light of frequency shining on it? (A) Vnew >2Vstop V_{\text {new }}>2 V_{\text {stop }} (B) Vnew =2Vstop V_{\text {new }}=2 V_{\text {stop }} (C) Vstop <Vnew <2Vstop V_{\text {stop }}<V_{\text {new }}<2 V_{\text {stop }} (D) It is indeterminate from the given information

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