Download App

Atomic and Nuclear Physics — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsAtomic and Nuclear Physics1 Mark
Question
In a material medium, when a positron meets an electron both the particles annihilate leading to the emission of two gamma ray photons. This process forms the basis of an important diagnostic procedure called(a) MRI(b) PET(c) CAT    (d) SPECT
       
✓

Answer

(b) PET

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Atomic and Nuclear Physics→Atomic and Nuclear Physics — all question types→Physics STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

The dipole moment of each molecule of a paramagnetic gas is $1.5 \times 10^{-23} \ \mathrm{amp} \times \mathrm{m}^2$. The temperature of gas is $27^{\circ} \mathrm{C}$ and the number of molecules per unit volume in it is $2 \times 10^{26} \mathrm{~m}^{-3}$. The maximum possible intensity of magnetisation in the gas will be
→
Which of the following are correct for insulators?
→
In an LCR circuit the capacitance is made $\frac{1^\text{th}}{4}$ then what should be the change in inductance that the circuit remains in resonance again?
→
If a torch is used in place of monochromatic light in Young’s experiment what will happens(a) Fringe will appear for a moment then it will disappear(b) Fringes will occur as from monochromatic light(c) Only bright fringes will appear (d) No fringes will appear
 
 
 
 
→
​​​​50% of the X-rays coming from a Coolidge tube are able to pass through a 0.1mm thick aluminium foil. If the potential difference between the target and the filament is increased, the fraction of the X-rays passing through the same foil will be:
  1. 0%
  2. < 50%
  3. 50%
  4. > 50%
→
In Einstein’s picture of Photoelectric emission, the photoelectric emission does not take place by:
→
A wire of length L carrying current i is placed perpendicular to the magnetic induction B. The total force on the wire is
→
A particle is projected in a plane perpendicular to a uniform magnetic field. The area bounded by the path described by the particle is proportional to:
  1. The velocity.
  2. The momentum.
  3. The kinetic energy.
  4. None of these.
→
Two electrolytic cells containing $\mathrm{CuSO}_4$ and $\mathrm{AgNO}_3$ respectively are connected in series and a current is passed through them until $1 \ mg$ of copper is deposited in the first cell. The amount of silver deposited in the second cell during this time is approximately $[$Atomic weights of copper and silver are respectively $63.57$ and $107.88]$
→
A light rays beam enters from air into water. Out of the following which will not be changed ?
→