Q.
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a
Photoelectric current increases with increase in accelerating potential untill it becomes maximum value
b
High voltage spark passed across electrodes in a discharge tube if they are illuminated by ultraviolet light
c
To study the effect of potential on photoelectric current, we first maintain collector at some positive potential with respect to emitter
d
The maximum negative potential given to collector for which photoelectric current becomes zero is called stopping potential
answer is B.
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