Q.
The graph between 1λand stopping potential (V) of three metals having work functions ϕ1,ϕ2 and ϕ3 in an experiment of photo-electric effect is plotted as shown in the figure. Which of the following statement(s) is/are correct? Here λ is the wavelength of the incident ray].
see full answer
Start JEE / NEET / Foundation preparation at rupees 99/day !!
21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya
a
Ratio of work functions ϕ1:ϕ2:ϕ3=1:2:4
b
Ratio of work functions ϕ1:ϕ2:ϕ3=4:2:1
c
tan θ is directly proportional to hc, where h is Planck's constant and c is the speed of light
d
The violet colour light can eject photoelectrons from metals 2 and 3.
answer is A.
(Unlock A.I Detailed Solution for FREE)
Ready to Test Your Skills?
Check your Performance Today with our Free Mock Test used by Toppers!
Take Free Test
Detailed Solution
eV=hcλ−ϕ⇒V=hceλ−ϕe=hce1λ−ϕe∴ Slope =tanθ=hceϕ=hcλϕ1:ϕ2:ϕ3=1λ1:1λ2:1λ3=1:2:4
Watch 3-min video & get full concept clarity