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NEET-XII-Physics

42: Photoelectric Effect and Wave Particle Duality

with Solutions - page 2
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  • #11
    A point source of light is used in a photoelectric effect. If the source is removed farther from the emitting metal, the stopping potential
    (a) will increase
    (b) will decrease
    (c) will remain constant
    (d) will either increase or decrease
    digAnsr:   c
    Ans : (c) will remain constant
    As the source is removed farther from the emitting metal, the intensity of light will decrease. As the stopping potential does not depend on the intensity of light, it will remain constant.
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