Conservation of Angular Momentum, Class 11 Physics NCERT Solutions

1. There will be total 10 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. Two discs of moments of inertia I1 and I2 about their respective axes (normal to the disc and passing through the centre), and rotating with angular speeds I1 and I2 are brought into contact face to face with their axes of rotation coincident. What is the angular speed of the two disc system?

 A

 B

 C

 D

Question 1 of 10

2. Which of the following doesn’t use the application of Conservation of Angular Momentum?

 Cat landing gently on feet

 A skater performing a fast spin

  A diver performing somersaults while diving

 Fruit falling off the tree

Question 2 of 10

3. Space craft orientation is based on the principle of:

 conservation of energy

 conservation of linear momentum

  conservation of angular momentum

 all of above

Question 3 of 10

4. What is the relation between torque and angular momentum?

 A

 B

 C

 D

Question 4 of 10

5. A circus acrobat while performing spins brings his limbs closer to the body. Due to this

  Moment of inertia increases and angular velocity increases

 Moment of inertia decreases and angular velocity decreases

  Moment of inertia increases and angular velocity decreases

  Moment of inertia decreases and angular velocity increases

Question 5 of 10

6. An earth satellite is moving around the earth in a circular orbit. In such case, what is conserved?

 angular momentum

  force

  linear momentum

 velocity

Question 6 of 10

7. A child can balance himself on a moving cycle than on a stationary cycle. Based on

 Conservation of Angular Momentum

 Conservation of Energy

 Conservation of Momentum

 Conservation of Kinetic Energy Only

Question 7 of 10

8. A child stands at the centre of a turntable with his two arms outstretched. The turntable is set rotating with an angular speed of 40 rpm. How much is the angular speed of the child if he folds his hands back and thereby reduces his moment if inertia to 2/5 times the initial value? Assume that the turntable rotates without friction.

 16 rpm

 100 rpm

 40 rpm

 Given data is not sufficient.

Question 8 of 10

9. A circus acrobat while performing spins brings his limbs closer to the body. Due to this

  Angular Momentum is conserved but K.E. is not conserved

  Angular Momentum is not conserved and also K.E. is not conserved.

 Angular Momentum is not conserved but K.E. is conserved.

 Angular Momentum is conserved and also K.E. is conserved

Question 9 of 10

10. A sphere of mass 1 kg and radius 1m rotates with a speed of 100 rpm about the axis passing through its centre. Calculate the angular momentum.

 1.90 kg ms^-1

 1.90 kg m²s^-1

 19.0 kg ms^-1

  19.0 kg m²s^-1

Question 10 of 10

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