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10 Question-answer on photoelectric effect 1.        Photo electric shows (a)     Wave like behavior of light (b)    Particle like behavior of light (c)     Both particle and wave like behavior of light (d)    Neither wave like nor particle like behavior of light Ans: ( b) 2.        The best metal to be used for photoemission is (a)     Potassium (b)    Sodium (c)     Cesium (d)    Lithium. Ans: (c) 3.        Light of a particular frequency v is incident on a metal surface. When the intensity of incident radiation is increased, the photo-electric current (a)     Decreases (b)    Increases (c)     Remains unchanged (d)    Sometimes increases and sometime decreases. Ans: (b) 4.        The...