Physics Current Electricity ETEA 2022
PMDC Verified Question 64 of 112
In a conducting electric wire, the electric current flows due to:
A
Protons
B
Ions
C
Holes
D
Electrons
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Electrons
Concept:

Current flow depends on the nature of the medium. In solid metallic conductors, the atoms are locked in a lattice, leaving only specific particles free to move.

Solution:

  • In metallic electric wires (like copper), only the outer valence electrons are loosely bound and free to drift.


  • Therefore, electric current in typical metallic conductors is exclusively due to the flow of free electrons.


Why other options are incorrect:

  • Opt A: Protons are tightly bound in the atomic nucleus and cannot move.


  • Opt B: Ions are the primary charge carriers in liquid electrolytes, not solid wires.


  • Opt C: Holes act as charge carriers in semiconductors, not typical metallic wires.

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 Current Electricity 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