Select the incorrect graph for velocity of e- in an orbit vs. Z, 1n and n:

1.  

2.  

3.  

4.  

Subtopic:  Bohr's Theory |
 64%
From NCERT
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Number of waves produced by an electron in one complete revolution in nth orbit is:

1.  n

2.  n2

3.  n+1

4.  2n+1

Subtopic:  Bohr's Theory |
 52%
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The energy of an electron moving in nth Bohr's orbit of an element is given by En=-13.6n2Z2 eV/atom (Z=atomic number). The graph of E vs. Z2 (keeping "n" constant) will be:

1.  

2.  

3.  

4.  

Subtopic:  Bohr's Theory |
From NCERT
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The spectrum produced from an element is:

1.  atomic spectrum

2.  line spectrum

3.  absorption spectrum

4.  any one of the above

Subtopic:  Type of Spectra |
From NCERT
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Which of the following expressions represents the spectrum of Balmer series (If n is the principal quantum number of higher energy level) in Hydrogen atom?

1.  v¯=Rn-1 n+1n2 cm-1

2.  v¯=Rn-2 n+24n2 cm-1

3.  v¯=Rn-2 n+2n2 cm-1

4.  v¯=Rn-1 n+14n2 cm-1

Subtopic:  Hydrogen Spectra |
 68%
From NCERT
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The H-spectrum show:

1.  Heisenberg's uncertainty principle

2.  Diffraction

3.  Polarization

4.  Presence of quantized energy level

Subtopic:  Bohr's Theory |
 75%
From NCERT
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In photoelectric effect, the kinetic energy of photoelectrons increases linearly with the:

1.  Wavelength of incident light.

2.  Frequency of incident light.

3.  Velocity of incident light.

4.  Atomic mass of an element.

Subtopic:  Photo Electric Effect |
 84%
From NCERT
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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%
From NCERT
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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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