Slope of V0 vs v curve is (where V0=stopping potential, v=subjected frequency)

1.  e

2.  he

3.  ϕ

4.  h

Subtopic:  Photo Electric Effect |
 76%
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According to Einstein's photoelectric equation, the graph between kinetic energy of

photoelectrons ejected and the frequency of the incident radiation is:

1.  

2.  

3.  

 

4.  

Subtopic:  Photo Electric Effect |
 68%
From NCERT
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The photoelectric emission from a surface starts only when the light incident upon the surface has a certain minimum:

1. Intensity 2. Wavelength
3. Frequency 4. Velocity
Subtopic:  Photo Electric Effect |
 74%
From NCERT
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If λ0 and λ be the threshold wavelength and the wavelength of incident light, the velocity of photo-electrons ejected from the metal surface is:

1.  2hmλ0-λ

2.  2hcmλ0-λ

3.  2hcmλ0-λλλ0

4.  2hm1λ0-1λ

Subtopic:  Photo Electric Effect | Bohr's Theory |
 76%
From NCERT
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The ratio of slopes of Kmax vs. v and V0 vs. v curves in photoelectric effect gives -

(v=frequency, Kmax=maximum kinetic energy, V0 stopping potential):

1.  Charge of electron

2.  Planck's constant

3.  Work function

4.  The ratio of Planck's constant of electronic charge

Subtopic:  Photo Electric Effect |
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 The largest de Broglie wavelength among the following (all have equal velocity) is: 

1.  CO2 molecule

2.  NH3 molecule

3.  Electron

4.  Proton

Subtopic:  De Broglie Equation |
 78%
From NCERT
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 Von two particles A and B are plotted against de-Broglie wavelengths. Where V is the potential on the particles. Which of the following relation is correct about the mass of particles?

                             

1.  mA=mB

2.  mA>mB

3.  mA<mB

4.  mAmB

Subtopic:  De Broglie Equation |
 61%
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The graphs that represents the variation of momentum of particle with de-Broglie wavelength is: 

1. 2.
3. 4.

Subtopic:  De Broglie Equation |
 67%
From NCERT
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The excited state of an H atom emits a photon of wavelength λ and returns to the ground state. The principal quantum number of the excited state is given by:

1.  λRλR-1

2.  λRλR-1

3.  λRλR+1

4.  λR-1λR

Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
 67%
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A dye absorbs a photon of wavelength λ and re-emits the same energy into two photons of wavelengths λ1  and λ2 respectively. The wavelength λ is related to λ1 and λ2 as-

1.  λ=λ1+λ2λ1λ2

2.  λ=λ1λ2λ1+λ2

3.  λ=λ12+λ22λ1+λ2

4.  λ=λ1λ2λ1+λ22

Subtopic:  Bohr's Theory |
 83%
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