The minimum wavelength of X-rays produced by the bombardment of electrons on the screen of a television set where the accelerating potential is 2.0K V will be______________?

Related Mcqs:

1. In an X-ray tube electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is_______________?

   A. he/ev
   B. he/Vc
   C. eV/h
   D. impossible to predict

2. The minimum wavelength of X-rays can further be reduced by _______________?

   A. Reducing the pressure or cooling the target
   B. Increasing the temperature of the filament.
   C. Using a target element of higher atomic number
   D. Increasing the potential difference between the cathode and the target

3. Quality of X-rays depends upon ____________ A-filament current B-accelerating voltage C-material of the target ?

   A. A & B
   B. B & C
   C. A & C
   D. A B & C

4. Wavelength of X-rays falling at glancing angle of 30? on a crystal with atmic spacing 2 x 10-10 for the fist order diffraction is________________?

   A. 4 x 10-10 m
   B. 2 x 10-10 m
   C. 0.02×10-10m
   D. 20×10-10m

5. The bombardment of nitrogen with alpha particles will produce______________?

   A. Neutron
   B. Proton
   C. Electron
   D. Positron

6. When a pure inductor of inductance L and a pure capacitor of capacitance C are connected in parallel to a sinusoidal potential difference V the potential difference across both L & C will be_______________?

   A. Same
   B. Different
   C. At L will be more than at C
   D. At L will be less than at C

7. Radiation with wavelength longer than red lights______________?

   A. ultraviolet rays
   B. X-rays
   C. infra red radiation
   D. visible radiation

8. In normal state of energy the incident high energy photons will be______________?

   A. Stimulated
   B. Absorbed
   C. Cause X-ray emission
   D. Cause laser production

9. When X-rays are passed through successive aluminum sheets what happens to their thickness ?

   A. increases
   B. it decreases
   C. it remains same
   D. sometimes increases and sometimes decreases

10. X-rays are diffracted by a crystal but not by a diffraction grating because_____________?

    A. The ions in a crystal are well arranged
    B. The lines in a diffraction grating cannot reflect X-rays.
    C. The penetration power of X-rays is high in a diffraction grating
    D. The wavelengths of X-rays are of the same order of magnitude as the separation between atoms in a crystal