The figure shows different graphs between stopping potential \(V_0\) and frequency \(v\) for photosensitive surfaces of cesium, potassium, sodium, and lithium. The plots are parallel. Which of the following about their work function is correct?
1. | \((i) > (ii) > (iii) > (iv)\) |
2. | \((i)>(iii)>(ii)> (iv)\) |
3. | \((iv)>(iii)>(ii)> (i)\) |
4. | \((i)=(iii)>(ii)= (iv)\) |
1. | \(A\) | 2. | \(B\) |
3. | \(C\) | 4. | None of these |
If stopping potential \(V_{0}\) is plotted versus frequency \(\nu\) in an experiment of the photoelectric effect, the graph as shown in the diagram is obtained. Then: (e is an electronic charge)
1. | \(\dfrac{b}{a}\) | Planck's constant =
2. | \(\dfrac{eb}{a}\) | Planck's constant =
3. | \(\dfrac{a}{b}\) | Planck's constant =
4. | \(\dfrac{ea}{b}\) | Planck's constant =
In the given graph of the photoelectric experiment, the maximum energy of the emitted photoelectron will be:
1. | \(2\) eV | 2. | \(0\) eV |
3. | \(4\) eV | 4. | \(4\) J |
1. | Curves \(a\) and \(b\) represent incident radiations of different frequencies and different intensities. |
2. | Curves \(a\) and \(b\) represent incident radiation of the same frequency but of different intensities. |
3. | Curves \(b\) and \(c\) represent incident radiation of different frequencies and different intensities. |
4. | Curves \(b\) and \(c\) represent incident radiations of the same frequency having the same intensity. |
Which of the following figures represent the variation of the particle momentum and the associated de-Broglie wavelength?
1. | |
2. | |
3. | |
4. | |
According to Einstein's photoelectric equation, the graph between the kinetic energy of photoelectrons ejected and the frequency of incident radiation is:
1. | |
2. | |
3. | 4. |
1. | 2. | ||
3. | 4. |
Assertion (A): | A particle of mass M at rest decay into two particles of masses m1 and m2, having non-zero velocities will have ratio of de-Broglie wavelengths unity. |
Reason (R): | Here we cannot apply conservation of linear momentum. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
Assertion (A): | Mass of a moving photon varies inversely to the wavelength. |
Reason (R): | \(\times\)(speed of light)2. | Energy of the particle = Mass
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | (A) is False but (R) is True. |