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_______________?

Related Mcqs:

1. 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______________?

   A. 6.2 x 10-10m
   B. 9.1 x 10-18m
   C. 3.11 x 10-10m
   D. 4 x 10-10m

2. In a photoelectric effect monochromatic light is incident on a metal surface. If the incident light of twice the intensity but of same wavelength the kinetic energy of the emitted electron_______________?

   A. Becomes double
   B. Remains same
   C. Becomes half
   D. First increases then decrease because of the curvilinear graph

3. The linear momentum of an X-ray photon of wavelength 0.1A is_______________?

   A. 6.625x1023N-s
   B. 66.25x1023N-s
   C. 662.5x1023N-s
   D. data is insufficient

4. 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

5. 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

6. 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

7. Maximum frequency in the spectrum from X-ray tube is directly proportional to the______________?

   A. Number of incident electron i.e. filament current
   B. The kinetic energy of the incident electron i.e. the potential difference through which they are accelerated
   C. The soft target which can easily emit electrons
   D. All of above are correct

8. The radiations emitted form hydrogen filled discharge tube show____________?

   A. band spectrum
   B. line spectrum
   C. continuous spectrum
   D. absorption spectrum

9. 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

10. A cube of side 5 cm has a charge of 6 C. The surface density of charge is_________?

    A. 100 C m^–2
    B. 200 C m^–2
    C. 300 C m^–2
    D. 400 C m^–2

    Submitted by: Tauseef Ali