Physics Rotational & Circular Motion NUMS 2024
PMDC Verified Question 19 of 95
To find the direction of angular displacement:
A
Grasp the axis of rotation in right hand
B
Grasp the axis of rotation in left hand
C
Put the thumb of right hand in the direction of circular motion
D
Put the thumb of left hand in the direction of circular motion
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Grasp the axis of rotation in right hand
Concept:

Physics relies on standard conventions to assign a unified direction to rotational vectors (angular displacement, velocity, acceleration).

Solution:

  • This convention is strictly the Right Hand Rule.
  • You must grasp the axis of rotation in your right hand so that your curled fingers mimic the direction of the physical spin.
  • Your extended thumb will uniquely point in the direction of the angular vector.


Why other options are incorrect:

  • Option B and Option D use the left hand, which would yield the exact opposite (anti-parallel) vector.
  • Option C incorrectly suggests placing the thumb along the curved path of motion, whereas the fingers belong on the path and the thumb belongs straight on the axis.

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 Rotational & Circular Motion 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