Physics Rotational & Circular Motion SZABMU 2024
PMDC Verified Question 2 of 95
Which of the following rule helps us to detect the direction of angular velocity?
A
Head to tail rule
B
Kirchhoff rule
C
Left hand rule
D
Right hand rule
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Right hand rule
Concept:

Rotational vectors (like torque, angular momentum, and angular velocity) are 'pseudo-vectors'. Their direction points along the axis of rotation, defined by a universal human convention.

Solution:

  • By universal physics convention, the Right Hand Rule is used.
  • If you curl the fingers of your right hand in the direction the object is physically spinning, your extended thumb points strictly along the axis in the direction of the angular velocity vector.


Why other options are incorrect:

  • Head to tail rule is used for adding linear geometric vectors.
  • Kirchhoff's rule is for electrical circuits.
  • Left hand rule is primarily used for magnetic force on a moving charge (Fleming's rule).

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