Physics Electromagnetism DUHS 2023
PMDC Verified Question 19 of 58
What does the magnetic flux measure?
A
Area surrounded by a magnet
B
Strength of the magnetic field
C
Rate of change of magnetic force
D
The number of magnetic lines of force
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: The number of magnetic lines of force
Concept:

Magnetic flux is a conceptual and mathematical tool used to quantify the overall amount of a magnetic field permeating a given 2D surface.

Solution:

  • Imagine the magnetic field as a stream of water, and a wire loop as a net.


  • The flux is the total volume of water passing through the net.


  • Visually, in physics, this is represented by counting how many imaginary field lines pierce through the specified area.


  • Therefore, flux is an abstract measure of the number of magnetic lines of force crossing a boundary.


Why other options are incorrect:

Option A is purely geometrical space. Option B defines the density of lines, not the total count. Option C is a time-derivative completely unrelated to static flux.

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 Electromagnetism 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