Q. A tachometer is a device to measure
A) Gravitational pull
B) Speed of rotation
C) Surface tension
D) Tension in a spring
Explanation
The correct answer is Option B: Speed of rotation.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.