Physics Nuclear Physics MDCAT 2014
PMDC Verified Question 73 of 98
Three points of radioactive radiation are observed as shown in the figure presence of electric field, which type of radiation is shown in the path '1'?

+ - Path 2 Path 1 Path 3
A
Alpha
B
Beta
C
Gamma
D
Cathode ray
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Beta


Concept:

When radiations pass between electrically charged plates, they deflect according to Coulomb's Law: opposite charges attract.

Solution:

  • In standard test diagrams of this type, a radioactive source emits three distinct beams.


  • The beam deflecting strongly toward the positive plate must be negatively charged. Beta particles are high-speed electrons (negative), thus they bend toward the positive plate.


  • (Note: Gamma travels straight through un-deflected. Alpha deflects slightly toward the negative plate due to its positive charge and heavy mass).


Why other options are incorrect:

Alpha is positive. Gamma is neutral. Cathode rays are electrons but aren't classified as radioactive nuclear radiation.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

Previous Question All Nuclear Physics MCQs Next Question

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.

Enter Arena Sprint iOS App Android App