Dual Nature of Radiation PYQs - Last 10 Years

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Practice 25 KCET Physics questions from Dual Nature of Radiation. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.

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Last 10 Years Dual Nature of Radiation Questions

Showing 25 of 25 filtered questions.

1Dual Nature Of Radiation

Work function of the metal is

2Dual Nature Of Radiation

Variation of photoelectric current with anode potential is shown below. Choose the correct option ($V_0$ = stopping potential)

3Dual Nature Of Radiation

The anode voltage of a photocell is kept fixed. The frequency of the light falling on the cathode is gradually increased. Then the correct graph which shows the variation of photo current I with the frequency $v$ of incident light is

4Dual Nature Of Radiation

If we consider an electron and a photon of same de-Broglie wavelength, then they will have same

5Dual Nature Of Radiation

The photoelectric work function for photo metal is 2.4 eV . Among the four wavelengths, the wavelength of light for which photoemission does not take place is

6Dual Nature Of Radiation

Light of energy $E$ falls normally on a metal of work function $\frac{E}{3}$. The kinetic energies $K$ of the photo electrons are

7Dual Nature Of Radiation

The energy gap of an LED is \(2.4 \mathrm{~eV}\). When the LED is switched ON, the momentum of the emitted photons is

8Dual Nature Of Radiation

In an experiment to study photoelectric effect the observed variation of stopping potential with frequency of incident radiation is as shown in the figure. The slope and \(y\)-intercept are respectively

9Dual Nature Of Radiation

A 60 W source emits monochromatic light of wavelength 662.5 nm. The number of photons emitted per second is

10Dual Nature Of Radiation

In a photo electric experiment, if both the intensity and frequency of the incident light are doubled, then the saturation photoelectric current

11Dual Nature Of Radiation

The de-Broglie wavelength of a particle of kinetic energy \(K\) is \(\lambda\), the wavelength of the particle, if its kinetic energy \(\frac{K}{4}\) is

12Dual Nature Of Radiation

The kinetic energy of the photoelectrons increases by \(0.52 \mathrm{~eV}\) when the wavelength of incident light is changed from \(500 \mathrm{~nm}\) to another wavelength which is approximately

13Dual Nature Of Radiation

According to Einstein's photoelectric equation to the graph between kinetic energy of photoelectrons ejected and the frequency of incident radiation is

14Dual Nature Of Radiation

The work-function of a metal is 1 eV. Light of wavelength \(3000 \mathop A\limits^o\) is incident on this metal surface. The velocity of emitted photoelectrons will be

15Dual Nature Of Radiation

A proton moving with a momentum \(p_1\) has a kinetic energy \(1 / 8\)th of its rest mass-energy. Another light photon having energy equal to the kinetic energy of the possesses a momentum \(p_2\). Then, the ratio \(\frac{p_1-p_2}{p_1}\) is...

16Dual Nature Of Radiation

The following graph represents the variation of photocurrent with anode potential for a metal surface. Here \(I_1, I_2\) and \(I_3\) represents intensities and \(\gamma_1, \gamma_2, \gamma_3\) represent frequency for curves \(1,2\) and $$3$...

17Dual Nature Of Radiation

A hot filament liberates an electron with zero initial velocity. The anode potential is \(1200 \mathrm{~V}\). The speed of the electron when it strikes the anode is

18Dual Nature Of Radiation

The de-Broglie wavelength associated with electron of hydrogen atom in this ground state is

19Dual Nature Of Radiation

Light of certain frequency and intensity incident on a photosensitive material causes photoelectric effect. If both the frequency and intensity are doubled, the photoelectric saturation current becomes

20Dual Nature Of Radiation

An electron is moving with an initial velocity \(\mathbf{v}=v_0 \hat{\mathbf{i}}\) and is in a uniform magnetic field \(\mathbf{B}=B_0 \hat{\mathbf{j}}\). Then its de-Broglie wavelength

21Dual Nature Of Radiation

The number of photons falling per second on a completely darkened plate to produce a force of $6.62 \times 10^{-5} \mathrm{~N}$ is $n$. If the wavelength of the light falling is $5 \times 10^{-7} \mathrm{~m}$, then $n=$ $\ldots \ldots \ldot...

22Dual Nature Of Radiation

The maximum kinetic energy of emitted photoelectrons depends on

23Dual Nature Of Radiation

A proton and an $\alpha$-particle are accelerated through the same potential difference $V$. The ratio of their de-Broglie wavelength is

24Dual Nature Of Radiation

From the following graph of photo current against collector plate potential, for two different intensities of light $I_1$ and $I_2$, one can conclude

25Dual Nature Of Radiation

A particle is dropped from a height $H$. The de-Broglie wavelength of the particle depends on height as