The kinetic energy of electron and proton is 10-32 J. Then the relation between their de-Broglie wavelengths is

(1) λp<λe                 

(2) λp>λe

(3) λp=λe                 

(4) λp=2λe

Subtopic:  De-broglie Wavelength |
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The de-Broglie wavelength of a particle accelerated with 150 volt potential is 10-10 m. If it is accelerated by 600 volts p.d., its wavelength will be
(1) 0.25 Å                 

(2) 0.5 Å

(3) 1.5 Å                   

(4) 2 Å

Subtopic:  De-broglie Wavelength |
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The de-Broglie wavelength associated with a hydrogen molecule moving with a thermal velocity of 3 km/s will be
(1) 1 Å                     

(2) 0.66 Å

(3) 6.6 Å                 

(4) 66 Å

Subtopic:  De-broglie Wavelength |
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When the momentum of a proton is changed by an amount P0, the corresponding change in the de-Broglie wavelength is found to be 0.25%. Then, the original momentum of the proton was 
(a) P0                   (b) 100  P0
(c) 400 P0             (d) 4 P0

Subtopic:  De-broglie Wavelength |
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The de-Broglie wavelength of a neutron at 27 °C is λ. What will be its wavelength at 927 °C
(a) λ / 2                        (b) λ / 3
(c) λ / 4                        (d) λ / 9

Subtopic:  De-broglie Wavelength |
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An electron and proton have the same de-Broglie wavelength. Then the kinetic energy of the electron is

(1) Zero

(2) Infinity

(3) Equal to the kinetic energy of the proton

(4) Greater than the kinetic energy of the proton

Subtopic:  De-broglie Wavelength |
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For the moving ball of cricket, the correct statement about de-Broglie wavelength is:
1. It is not applicable for such big particle
2. \(\frac{h}{\sqrt{2mE}}\)
3. \(\sqrt{\frac{h}{2mE}}\)
4. \(\frac{h}{2mE}\)

Subtopic:  De-broglie Wavelength |
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The kinetic energy of an electron with de-Broglie wavelength of 0.3 nanometer is 
(1) 0.168 eV           

(2) 16.8 eV

(3) 1.68 eV             

(4) 2.5 eV

Subtopic:  De-broglie Wavelength |
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The wavelength of de-Broglie wave is 2μm, then its momentum is (h = 6.63×10-34 J-s) 
(a) 3.315×10-28 kg-m/s            (b) 1.66×10-28 kg-m/s
(c) 4.97×10-28 kg-m/s              (d) 9.9×10-28 kg-m/s

Subtopic:  De-broglie Wavelength |
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If the kinetic energy of a free electron doubles, its de-Broglie wavelength changes by the factor 
(1) 12             

(2) 2

(3) 12                

(4) 2

Subtopic:  De-broglie Wavelength |
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