Physics MCQ Quiz Hub

1. Compton effect shows that
X-rays are waves
X-rays have high energy
X-rays can penetrate matter
Photons have momentum

2. X-rays when incident on a metal
Exert a force on it
Transfer energy to it
Transfer pressure to it
All of the above

3. What is the difference between soft and hard X-rays
Velocity
Intensity
Frequency
Velocity

4. When X rays pass through a strong uniform magnetic field, Then they
Do not get deflected at all
Get deflected in the direction of the field
Get deflected in the direction opposite to the field
Get deflected in the direction perpendicular to the field

5. f the voltage of X-ray tube is doubled, the intensity of X-rays will become
Half
Unchanged
Double
Four times

6. X-rays cannot be deflected by means of an ordinary grating due to
Large wavelength
High speed
Short wavelength
None of these

7. If energy of K-shell electron is – 40000 eV and If 60000 V potential is applied at coolidge tube then which of the following X-ray will get form
Continuous
White X-rays
Continuous and all series of characteristic
None of these

8. On increasing the number of electrons striking the anode of an X-ray tube, which one of the following parameters of the resulting X-rays would increase
Penetration power
Frequency
Wavelength
Intensity

9. X-rays are
Stream of electrons
Electromagnetic radiations of high frequency
Electromagnetic radiations of high frequency
Stream of uncharged particles

10. X-rays which can penetrate through longer distances in substance are called
Soft X-rays (b) Continuous X-rays
Continuous X-rays
Hard X-rays
None of these

11. For harder X-rays
The wavelength is higher
The intensity is higher
The frequency is higher
The photon energy is lower

12. The voltage applied across an X-rays tube is nearly
10 V
100 V
10000 V
106 V

13. X-rays are known to be electromagnetic radiations. Therefore the X-ray photon has
Electric charge
Magnetic moment
Both electric charge and magnetic moment
Neither electric charge nor magnetic moment

14. X-rays were discovered by
Becquerel
Roentgen
Marie
Marie

15. X-rays and gamma rays are both electromagnetic waves. Which of the following statements is true
In general X-rays have larger wavelength than of gamma rays
In general X-rays have larger wavelength than of gamma rays
Gamma rays have smaller frequency than that of X-rays
Gamma rays have smaller frequency than that of X-rays

16. Gamma rays have smaller frequency than that of X-rays
Increase in its velocity
Increase in its frequency
Increase in its intensity
Decrease in its velocity

17. A direct X-ray photograph of the intestines is not generally taken by the radiologists because
Intestines would burst on exposure to X-rays
The X-rays would not pass through the intestines
The X-rays will pass through the intestines without causing a good shadow for any useful diagnosis
A very small exposure of X-rays causes cancer in the intestines

18. he X-ray beam coming from an X-ray tube will be (a)
Monochromatic
Having all wavelengths smaller than a certain maximum wavelength
Having all wavelengths larger than a certain minimum wavelength
Having all wavelengths lying between a minimum and a maximum wavelength

19. X-rays are in nature similar to
Beta rays
Gamma rays
de-Broglie waves
Cathode rays

20. In radio theraphy, X-rays are used to
Detect bone fractures
Treat cancer by controlled exposure
Detect heart diseases
Detect fault in radio receiving circuits

21. Which of the following wavelength falls in X-ray region
10000 Å
1000 Å (
1 Å
10–2 Å

22. For continuous X-rays produced wavelength is
Inversely proportional to the energy of the electrons hitting the target
Inversely proportional to the intensity of the electron beam
Proportional to intensity of the electron beam
Proportional to target temperature

23. Penetrating power of X-rays can be increased by
Increasing the potential difference between anode and cathode
Decreasing the potential difference between anode and cathode
Increasing the cathode filament current
Decreasing the cathode filament current

24. The wavelength of X-rays is
2000 Å
2 Å
1 mm
1 cm