Physics Electromagnetism ETEA 2022
PMDC Verified Question 29 of 58
Magnetic lines of force are:
A
Imaginary lines which show actual magnetic field
B
Actual lines which show actual magnetic field
C
Imaginary lines which show imaginary magnetic field
D
Actual lines which show imaginary magnetic field
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Imaginary lines which show actual magnetic field
Concept:

Magnetic field lines are a visual tool introduced by Michael Faraday to conceptualize and map the invisible magnetic field.

Solution:

  • The magnetic field itself is a real physical entity that stores energy and exerts real forces.


  • However, the "lines" drawn to represent it do not exist physically in space; they are an illustrative abstraction.


  • Therefore, they are imaginary lines used to accurately depict a real (actual) physical field.


Why other options are incorrect:

Option B is false because you cannot touch or extract a "line" from a vacuum. Option C is false because the magnetic field itself is a real phenomenon. Option D is an oxymoron.

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.

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