Questions
In a photo electric cell 3mA photo current stops when a negative potential of 6.4v is given to the collector w.r to emitter, the maximum velocity of emitted electrons.
detailed solution
Correct option is A
vm=2eVm=2X1.6X10−1.99X10−31X6.4 vm=2 X4X83X105 vm=10.72X105m/s vm=14X105m/sTalk to our academic expert!
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Figure shows the stopping potential (V)versus frequency (v) graph for photoelectric effect in a metal. From the graph, The Planck's constant (h) is . The value of y is
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