Dual Nature of Matter and Radiation (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 11  16 of 36
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Question number: 11
» Dual Nature of Matter and Radiation » DeBroglie Relation
Question
One electron & one proton have equal energies then ratio of associated deBroglie wavelength will be,
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 12
» Dual Nature of Matter and Radiation » DeBroglie Relation
Question
A hydrogen atom moving at a speed v absorbs a photon of wavelength 122 nm and stops. Find the value of v. (Mass of hydrogen atom = 1.67 × 10 ^{27} kg)
Choices
Choice (4)  Response  

a.  3.05 m/s 

b.  3.5 m/s 

c.  32.5 m/s 

d.  3.25 m/s 

Question number: 13
» Dual Nature of Matter and Radiation » Einstein's Photoelectric Equation
Assertion (Ꭺ)
Photosensitivity of a metal is large if its work function is small.
Reason (Ꭱ)
Work function = hf _{0. } where f _{0} is the threshold frequency.
Choices
Choice (4)  Response  

a.  Both Ꭺ and Ꭱ are false 

b.  Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ 

c.  Ꭺ is true but Ꭱ is false 

d.  Ꭺ is false but Ꭱ is true 

Question number: 14
» Dual Nature of Matter and Radiation » DeBroglie Relation
Question
An electron microscope uses 40 keV electrons. Find its resolving limit on the assumption that it is equal to the wavelength of the electron
Choices
Choice (4)  Response  

a.  0.061 Å 

b.  0.6 Å 

c.  0.61 Å 

d.  0.06 Å 

Question number: 15
» Dual Nature of Matter and Radiation » DeBroglie Relation
Question
deBroglie wavelength of an electron is 10 Å then velocity will be
Choices
Choice (4)  Response  

a.  7.2 × 10 ^{7} m/s 

b.  7.2 × 10 ^{6} m/s 

c.  7.2 × 10 ^{4} m/s 

d.  7.2 × 10 ^{5} m/s 

Question number: 16
» Dual Nature of Matter and Radiation » DeBroglie Relation
Question
Energy of an αparticle, having deBroglie wavelength of 0.004 Å is approximately.
Choices
Choice (4)  Response  

a.  1275 eV 

b.  1200 KeV 

c.  1200 GeV 

d.  1200 MeV 
