Dual Nature of Radiation and Matter

A proton, an electron and an alpha particle have the same energies. Their de-Broglie wavelengths will be compared as :

1. p > e >
2. < p < e
3. e > > p
4. p < e <

UV light of 4.13 eV is incident on a photosensitive metal surface having work function 3.13 eV. The maximum kinetic energy of ejected photoelectrons will be:

1. 4.13 eV
2. 1 eV
3. 7.26 eV
4. 3.13 eV

A proton and an electron are associated with same de-Broglie wavelength. The ratio of their kinetic energies is: (Assume h = 6.63 10-34 J s, me = 9.0 10-31 kg and mp = 1836 times me)

1. 1 : 11836
2. 1 : 1836
3. 1 : 1836
4. 1 : 1 1836

A proton and an electron have the same de Broglie wavelength. If Kp and Ke be the kinetic energies of proton and electron respectively, then choose the correct relation :

1. Kp > Ke
2. Kp = Ke
3. Kp < Ke
4. Kp = Ke2

Which of the following phenomena is not explained by wave nature of light? Choose the most appropriate answer from the options given below:

1. C only
2. B, D only
3. A, C only
4. E only

In photoelectric experiment energy of 2.48 eV irradiates a photo sensitive material. The stopping potential was measured to be 0.5 V. Work function of the photo sensitive material is :

1. 1.98 eV
2. 1.68 eV
3. 2.48 eV
4. 0.5 eV

When UV light of wavelength 300 nm is incident on the metal surface having work function 2.13 eV, electron emission takes place. The stopping potential is : (Given hc = 1240 eV nm)

1. 4 V
2. 2 V
3. 4.1 V
4. 1.5 V

Given below are two statements : [figure] In the light of the above statements, choose the most appropriate answer from the options given below.

1. Statement I is correct and Statement II is incorrect
2. Statement I is incorrect but Statement II is correct
3. Both Statement I and Statement II are correct
4. Both Statement I and Statement II are incorrect

Which of the following statement is not true about stopping potential (V0) ?

1. It depends upon frequency of the incident light.
2. It is 1/e times the maximum kinetic energy of electrons emitted.
3. It increases with increase in intensity of the incident light.
4. It depends on the nature of emitter material.

Which figure shows the correct variation of applied potential difference (V) with photoelectric current (I) at two different intensities of light (I1<I2) of same wavelengths :

1. [figure]
2. [figure]
3. [figure]
4. [figure]