New chat PYQ Library Doubts Rank report

Sign in to see Recents

Sign in to save progress →

Dual Nature of Radiation question

2022 · 26 Jun · Shift 2 · Q72

Guest · try one question or challengeGuest · try one question or challenge

PYQ Library
JEE Main
Physics
Dual Nature of Radiation
2022 · 26 Jun · Shift 2 · Q72

Dual Nature of Radiation question

2022 · 26 Jun · Shift 2 · Q72

JEE MainPhysicsDual Nature of RadiationNumerical+4 / −1

The stopping potential for photoelectrons emitted from a surface illuminated by light of wavelength 6630

\mathop A\limits^o

is 0.42 V. If the threshold frequency is x

\times

1013 /s, where x is

\underline{\hspace{2cm}}

(nearest integer). (Given, speed light = 3

\times

108 m/s, Planck's constant = 6.63

\times

10

-

34 Js)

Numerical answer

More from Dual Nature of Radiation

An electron (mass $m$ ) with an initial velocity $v = v_{0} \hat{i} (v_{0} > 0)$ is moving in an electric field $E = - E_{0} \hat{i} (E_{0} > 0)$ where $E_{0}$ is constant. If at $t = 0$ de…2022 · MCQ
With reference to the observations in photo-electric effect, identify the correct statements from below : (A) The square of maximum velocity of photoelectrons varies linearly with frequency of incident light. (B) The value of saturation…2022 · MCQ
An $α$ particle and a carbon 12 atom has same kinetic energy K. The ratio of their de-Broglie wavelengths $(λ_{α} : λ_{C 12})$ is :2022 · MCQ
The equation $λ = \frac{1.227}{x} nm$ can be used to find the de-Brogli wavelength of an electron. In this equation $x$ stands for : Where $m =$ mass of electron $P =$ momentum of electron $K =$ …2022 · MCQ
Two streams of photons, possessing energies equal to five and ten times the work function of metal are incident on the metal surface successively. The ratio of maximum velocities of the photoelectron emitted, in the two cases respectively,…2022 · MCQ
The de Broglie wavelengths for an electron and a photon are $λ$ e and $λ$ p respectively. For the same kinetic energy of electron and photon, which of the following presents the correct relation between the de Broglie…2022 · MCQ
Let K1 and K2 be the maximum kinetic energies of photo-electrons emitted when two monochromatic beams of wavelength $λ$ 1 and $λ$ 2, respectively are incident on a metallic surface. If $λ$ 1 = 3 $λ$ 2 then :2022 · MCQ
The kinetic energy of emitted electron is E when the light incident on the metal has wavelength $λ$ . To double the kinetic energy, the incident light must have wavelength:2022 · MCQ