LIVE Course for free

Rated by 1 million+ students
Get app now
Class 8 Foundation Course
Class 9 Foundation Course
Class 10 Foundation Course
Class 11 Foundation Course
Class 12 Foundation Course
JEE COURSE
NEET COURSE
0 votes
42 views
in Physics by (30.0k points)
closed by
If we increase the angular speed of the rotor, the power of it will _________
1. decrease
2. increase
3. first increase then decrease
4. first decrease then increase

1 Answer

0 votes
by (53.7k points)
selected by
 
Best answer
Correct Answer - Option 2 : increase

CONCEPT:

  • Torque: The twist to an object around a specific axis is called torque. It is the vector product of position vector and force.
    • It is also known as the turning effect.
  • The power of the rotor required to transmit energy to apply a torque τ to rotate it with angular velocity ω is

P = τ ω

EXPLANATION:

The power of a rotating rotor is given by

P = τ ω

P ∝ ω 

  • So, if we increase the angular speed of the rotor, the power will increase.
  • Hence, the correct answer is option 2.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...