NCERT Class 11 Physics MCQ Chapter 5 Work, Energy and Power Solutions, AHSEC Class 11 Physics Multiple Choice Question Answer to each chapter is provided in the list so that you can easily browse throughout different chapters NCERT Class 11 Physics MCQ Chapter 5 Work, Energy and Power Question Answer and select needs one.
Class 11 Physics MCQ Chapter 5 Work, Energy and Power
Also, you can read the SCERT book online in these sections NCERT Class 11 Physics Multiple Choice Solutions by Expert Teachers as per SCERT (CBSE) Book guidelines. AHSEC Class 11 Physics MCQ Solutions. These solutions are part of SCERT All Subject Solutions. Here we have given HS 1st Year Physics Objective Type Question Answer for All Subjects, You can practice these here.
Work, Energy and Power
Chapter: 5
| PART – Ⅰ |
MULTIPLE CHOICE QUESTION ANSWER
1. Which of the following quantities is a scalar?
(i) Force.
(ii) Velocity.
(iii) Work.
(iv) Acceleration.
Ans: (iii) Work.
2. The rate of doing work is called____________.
(i) Force.
(ii) Acceleration.
(iii) Power.
(iv) Displacement.
Ans: (iii) Power.
3. What does the term ‘power’ in physics refer to?
(i) The total energy consumed.
(ii) The rate at which work is done.
(iii) The amount of work done.
(iv) The force applied over distance.
Ans: (ii) The rate at which work is done.
4. Find the potential energy stored in a ball of mass 5 kg placed at a height of 3 m above the ground.
(i) 121 J.
(ii) 147 J.
(iii) 227 J.
(iv) 182 J.
Ans: (ii) 147 J.
5. What is the unit of work in the International System of Units (SI)?
(i) Joule.
(ii) Newton.
(iii) Watt.
(iv) Metre.
Ans: (i) Joule.
6. Unit of energy is:
(i) Kwh.
(ii) Joule.
(iii) Electron volt.
(iv) All of the above.
Ans: (iv) All of the above.
7. If work done is positive, what can be inferred about the angle between force and displacement?
(i) θ = 90°
(ii) θ = 180°
(iii) θ < 90°
(iv) θ > 90°
Ans: (iii) θ < 90°
8. What is the relationship between power, work, and time?
(i) Power = Work × Time.
(ii) Power = Work/Time.
(iii) Power = Time/Work.
(iv) Power = Work + Time.
Ans: (ii) Power = Work/Time.
9. Which of the following is not a conservative force?
(i) Gravitational force.
(ii) Frictional force.
(iii) Spring force.
(iv) None of these.
Ans: (ii) Frictional force.
10. What is the sign of work done by a man lifting a bucket out of a well?
(i) Negative.
(ii) Zero.
(iii) Positive.
(iv) Undefined.
Ans: (iii) Positive.
11. The net force acting on the body is calculated as:
(i) Applied force + Friction.
(ii) Applied force – Friction.
(iii) Friction – Applied force.
(iv) None of the above.
Ans: (ii) Applied force – Friction.
12. What is the SI unit of work and energy?
(i) Newton (N).
(ii) Joule (J).
(iii) Watt (W).
(iv) Pascal (Pa).
Ans: (ii) Joule (J).
13. If a light body and heavy body have the same kinetic energy, then which one has greater linear momentum?
(i) Lighter body.
(ii) Heavier body.
(iii) Both have the same momentum.
(iv) Can’t be predicted.
Ans: (ii) Heavier body.
14. In an inelastic collision, which quantity is conserved?
(i) Kinetic energy.
(ii) Total energy.
(iii) Linear momentum.
(iv) Potential energy.
Ans: (iii) Linear momentum.
15. The energy possessed by a body by the virtue of its motion is called ______.
(i) Kinetic energy.
(ii) Potential energy.
(iii) Total energy.
(iv) Motion energy.
Ans: (i) Kinetic energy.
