Photoelectric effect experiments are performed using three different metal plates p, q and r having work functions $Φ_{p} = 2.0 e V, Φ_{q} = 2.5 e V a n d Φ_{r} = 3.0 e V$ respectively. A light beam containing wavelengths of 550 nm, 450nm and 350nm with equal intensities illuminates each of the plates. The correct I - V graph for the experiment is : [Take hc = 1240 eV nm]

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B

intensity is same for all the wavelengths, hence current would remain same.The difference between the energy of photon and work function is proportional to the stopping potential.the difference would be greatest for p plate .

Watch the next video for the solution.

Suggest Corrections

Similar questions

Photoelectric effect experiments are performed using three different metal plates p,q and r having work functions $ϕ_{p} = 2.0 e V, ϕ_{q} = 2.5 e V a n d ϕ_{r} = 3.0 e V$ , respectively. A light beam containing wavelengths of 550 nm, 450 nm and 350 nm with equal intensties illuminates each of the plates. The correct I-V graph for the experiment is (IIT-JEE-2009)

Q. In a photoelectric experiment, two metal plates

A

and

B

are used for a given light intensity

I

and frequency

f

. Work function of metal

B

is more than that of

A

. The correct variation of stopping potential difference versus frequency is given by

Q. A beam of light consisting of two wavelengths

420 nm

and

540 nm

falls on two metals

1

and

2

of work functions

4.0 eV

and

2.5 eV

respectively. If the intensities of the two wavelengths are equal, which of the graphs shown in figure represents the variation of photoelectric current

(i)

with voltage

(V)

is correct?
[Take

h c = 1240 eV (nm)

]

A student performs an experiment to observe photoelectric effect by shining light on a metal surface. The light source limits light of wavelength 450nm. The table given below lists the available metals and their corresponding work functions
$\begin{matrix} M e t a l & ϕ (e v) T u n g s t e n & 4.5 L i t h i u m & 2.3 B a r i u m & 2.5 T a n t a l u m & 4.2 \end{matrix}$

Suppose the photoelectric experiment is done separately with these metals with light of wavelength 450nm. The maximum magnitude of stopping potential amongst all the metals is

Q. In a photoemission experiment, the maximum kinetic energies of photoelectrons from metals