1.

Fig. shows variation of photocurrent with anode potential for photosensitive surface for three different radiations. Let I_(a), I_(b) and I_(c) be the intensities and f_(a),f_(b) and f_(c) the frequencies for curves a, b to c, then:

Answer»

`f_(a)=f_(b),I_(a)neI_(b)`
`f_(a)=f_(C),I_(a)=I_(c)`
`f_(a)=f_(b),I_(a)=I_(b)`
`f_(b)=f_(c),I_(b)=I_(c)`

Solution :SATURATION current is same for curves .b. and .c. but different for .a.. So `I_(b)=I_(C)&I_(a) neI_(b)`. As stopping potential is same for a and b, so `f_(a)=f_(b)`


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