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Dual Nature Of Radiation and Matter Quiz-1

Dear Readers,

As per analysis for previous years, it has been observed that students preparing for NEET find Physics out of all the sections to be complex to handle and the majority of them are not able to comprehend the reason behind it. This problem arises especially because these aspirants appearing for the examination are more inclined to have a keen interest in Biology due to their medical background. 


Furthermore, sections such as Physics are dominantly based on theories, laws, numerical in comparison to a section of Biology which is more of fact-based, life sciences, and includes substantial explanations. By using the table given below, you easily and directly access to the topics and respective links of MCQs. Moreover, to make learning smooth and efficient, all the questions come with their supportive solutions to make utilization of time even more productive. Students will be covered for all their studies as the topics are available from basics to even the most advanced. 



Q1. Energy conversion in a photoelectric cell takes place form
  •  Chemical to electrical
  •  Magnetic to electrical
  •  Optical to electrical
  •  Mechanical to electrical
Solution
Optical to electrical

Q2.A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected along the direction of the fields with a certain velocity, then
  •  Its velocity will decrease
  •  Its velocity will increase
  •  It will turn towards right of direction of motion
  •  It will turns towards left of direction of motion
Solution
When E, v and B are all along same direction, then magnetic force experienced by electron is zero while electric force is acting opposite to velocity of electron, so velocity of electron will decreas

Q3.  Which phenomenon best supports the theory that matter has a wave nature
  •   Electron momentum
  •  Electron diffraction
  •  Photon momentum
  •  Photon diffraction
Solution
Wave nature of matter of de Broglie was proved when accelerated electrons showed diffraction by metal foil in the same manner as X-ray diffraction

Q4. Consider the following statements concerning electrons : I. Electrons are universal constituents of mater. II. J J Thomson received the very first Nobel prize in Physics for discovering the electron. III. The mass of the electron is about 1/2000 of a neutron. IV. According to Bohr the linear momentum of the electron is quantised in the hydrogen atom. Which of the above statements are not correct?
  •  I
  •  II
  •  III
  •  IV
Solution
The mass of electron is about 1/1836 times that of a neutron and angular momentum of electron is quantised in the hydrogen atoms but not the linear momentum of electron

Q5.The working principle of the mass spectrograph is that for a given combination of accelerating potential and magnetic field,
the ion beam (with charge q and mass M) to be collected at different positions of ion collectors will depend upon the value of
  •  √(q/M)
  •  (q/M)2
  •  q/M
  •  qM
Solution
                       


Q6. An electron of Kα spectral line of an atom is 59 keV, then the wavelength of Kα line will be
  •  0.20 Å
  •  0.42 Å
  • 0.31 Å
  •  0.62 Å
Solution
                       



Q7.The de-Broglie wavelength λ associated with an electron having kinetic energy E is given by the expression








Solution
                         



Q8.Electric field and magnetic field in Thomson mass spectrograph are applied
  •  Simultaneously, perpendicular
  •  Perpendicular but not simultaneously
  •  Parallel but not simultaneously
  •  Parallel simultaneously
Solution
                       

Q9.If the wavelength of light is 4000 Å, then the number of waves in 1 mm length will be
  •  25
  •  0.25
  •  0.25×104
  •  25×104
Solution
                         



Q10. Two identical metal plates shown photoelectric effect by a light of wavelength λÅ falls on plate A and λB on plate B(λA=2λB ). The maximum kinetic energy is
  •  2 KA=KB
  •  KA7<KB/2
  •  KA=2KB
  • KA=KB/2
Solution
                           


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