De Broglie's Relationship NEET Questions

Physical Chemistry - Atomic Structure

De Broglie's Relationship MCQ Questions


1.
Who proposed that matter, like radiation, exhibits dual (particle and wave) behaviour?
A.
Louis de Broglie
B.
Werner Heisenberg
C.
Niels Bohr
D.
Erwin Schrodinger
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ANSWER :
A. Louis de Broglie
2.
What is the correct mathematical expression for the de Broglie relationship connecting wavelength (λ) and momentum (p) of a moving particle?
A.
λ = h/p
B.
λ = hp
C.
λ = p/h
D.
λ = h²/p
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ANSWER :
A. λ = h/p
3.
The de Broglie wavelength associated with a moving particle is inversely proportional to which of the following?
A.
Temperature of the surroundings
B.
Charge of the particle
C.
Planck's constant
D.
Momentum of the particle
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ANSWER :
D. Momentum of the particle
4.
If the velocity of a moving electron is doubled while its mass remains constant, how does its de Broglie wavelength change?
A.
It remains the same
B.
It becomes double
C.
It becomes half
D.
It becomes four times
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ANSWER :
C. It becomes half
5.
The de Broglie wavelength of an electron accelerated through a potential difference V is given by which expression?
A.
λ = 2meV/h
B.
λ = h/√(2meV)
C.
λ = h√(2meV)
D.
λ = h/(2meV)
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ANSWER :
B. λ = h/√(2meV)
6.
Which of the following gives the correct relationship between de Broglie wavelength (λ) and kinetic energy (E) of a particle of mass m?
A.
λ = h·2mE
B.
λ = 2mE/h
C.
λ = √(2mE)/h
D.
λ = h/√(2mE)
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ANSWER :
D. λ = h/√(2mE)