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
Related Mcqs:
- 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 - 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 - 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 - Product of wavelength and time period is _______________?
A. Frequency
B. Velocity
C. Time period
D. WavelengthSubmitted by: Chakar Hussain Shar
- Radiation with wavelength longer than red lights______________?
A. ultraviolet rays
B. X-rays
C. infra red radiation
D. visible radiation - Hydrogen atom does not emit X-rays because _________________?
A. its energy levels are too close to each other
B. its energy levels are too far apart
C. it is too small in size
D. it has a single electron - X-rays are similar in nature to_______________?
A. Cathode rays
B. Positive rays
C. γ-rays
D. Beta rays - 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 - The characteristic X-rays spectrum is due to_____________?
A. The illumination of the target metal by ultra-violet radiation
B. The bombardment of the target by protons
C. The bombardment of target by electrons
D. The absorption of radiation by the target metal - 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
