What is the de-Broglie wavelength associated with an electron accelerated through a voltage of 900 V?

1.  0.31 Ao  

2.  0.41 Ao 

3.  0.5 Ao  

4.  0.16 A0

Subtopic:  De-broglie Wavelength |
 74%
From NCERT
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What is the de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (Kelvin) and mass m?

1. hmkT

2. h3mkT

3. 2h3mkT 

4. 2hmkT

Subtopic:  De-broglie Wavelength |
 80%
From NCERT
NEET - 2017
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If an electron of mass m with a de-Broglie wavelength of \(\lambda\) falls on the target in an X-ray tube, the cut-off wavelength ( λ0) of the emitted X-ray will be:

1. λ0=2mcλ2h         

2. λ0=2hmc

3. λ0=2m2c2λ3h2       

4. λ0=λ

Subtopic:  De-broglie Wavelength |
From NCERT
NEET - 2016
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An electron of mass m and a photon have the same energy E. Find the ratio of de-Broglie wavelength associated with the electron to that associated with the photon. (c is the velocity of light)

1. E2m1/2

2. c2mE1/2

3. 1c2mE1/2

4. 1cE2m1/2

 

Subtopic:  De-broglie Wavelength |
 59%
From NCERT
NEET - 2016
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Which of the following figures represents the variation of the particle momentum and the associated de-Broglie wavelength?

1. 2.
3. 4.
Subtopic:  De-broglie Wavelength |
 85%
From NCERT
NEET - 2015
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Light with a wavelength of 500 nm is incident on a metal with a work function of 2.28 eV. The de Broglie wavelength of the emitted electron will be:
1. \( <2.8 \times 10^{-10} \mathrm{~m} \)
2. \( <2.8 \times 10^{-9} \mathrm{~m} \)
3. \( \geq 2.8 \times 10^{-9} \mathrm{~m} \)
4. \( <2.8 \times 10^{-12} \mathrm{~m}\)

Subtopic:  De-broglie Wavelength |
 60%
From NCERT
NEET - 2015
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What will be the percentage change in the de-Broglie wavelength of the particle if the kinetic energy of the particle is increased to 16 times its previous value?
1. 25
2. 75
3. 60
4. 50

Subtopic:  De-broglie Wavelength |
 69%
From NCERT
NEET - 2014
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The wavelength \(\lambda_{e}\) of an electron and \(\lambda_{p}\) of a photon of the same energy E are related as:

1. λpλe2

2. λpλe 

3. λpλe

4. λp1λe

Subtopic:  De-broglie Wavelength |
 54%
From NCERT
NEET - 2013
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An \(\alpha -\) particle moves in a circular path of radius 0.83 cm in the presence of a magnetic field of \(0.25 \mathrm{~Wb} / \mathrm{m}^2\). The de-Broglie wavelength associated with the particle will be:

1. \(1~\mathring {\text{A}}\) 2. \(0.1~\mathring {\text{A}}\)
3. \(10~\mathring {\text{A}}\) 4. \(0.01~\mathring {\text{A}}\)
Subtopic:  De-broglie Wavelength |
 57%
From NCERT
NEET - 2012
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If the momentum of an electron is changed by p, then the de-Broglie wavelength associated with it changes by 0.5%. What is the initial momentum of the electron?

1. 200p

2. 400p

3. p200

4. 100p

Subtopic:  De-broglie Wavelength |
 60%
From NCERT
NEET - 2012
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