Physics Electromagnetism UHS 2023
PMDC Verified Question 13 of 58
The magnitude of magnetic force will be maximum on current carrying conductor in uniform magnetic field if conductor is placed?
A
Parallel to magnetic field
B
At 45 degree in magnetic field
C
Perpendicular to magnetic field
D
Antiparallel in 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 C: Perpendicular to magnetic field
Concept:

A macroscopic current-carrying wire experiences a magnetic Lorentz force. The magnitude relies heavily on its geometric orientation inside the external magnetic field.

Formula:

$$ F = ILB \sin(\theta) $$

Solution:

  • To maximize the force \( F \), the trigonometric multiplier \( \sin(\theta) \) must be at its maximum value of 1.


  • This occurs when the angle \( \theta \) between the wire and the field is \( 90^\circ \).


  • An angle of \( 90^\circ \) corresponds geometrically to being placed strictly perpendicular to the magnetic field lines.


Why other options are incorrect:

Options A and D result in a force of absolutely zero. Option B results in a force reduced by a factor of \( 0.707 \) (\( \sin 45^\circ \)).

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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