Question

a) 5X10 Hz
b) 5x10 Hz c) 2x10'' Hz d) 5x10'' Hz
19) (A): In photoelectric effect, when the frequency of incident light is doubled,
kinetic energy is more than doubled
(R) : Photo current increases when the intensity of incident light is increased
and is independent of frequency
a) Both A and R are true and R is the correct explanation
b) Both A and R are true but R is not the correct explanation of A
C) A is true but R is false
d) A is false but R is true​

Answer 1

Step-by-step explanation:

b.......is correct.

bcs intensity is directly proportional to no. of electron released,so the current increases.

KE=frequency-work function

let W=2

f1=4

KE1=4-2=2

f2=8

so KE2=8-2=6 which is more than double...

hope u understood,if not,can ask ur doubt.