Looking for MCQ questions for Class 9 Science Chapter 10? Explore our extensive collection of Work and Energy MCQ Science Class 9 with answers. These multiple-choice questions cover various topics such as work, energy, power, different forms of energy, and more. Whether you’re a student preparing for exams or a teacher seeking additional resources, our MCQs provide a valuable tool for learning and assessment. Enhance your understanding of the concepts of work and energy and improve your performance with these carefully crafted questions and accurate answers. Dive into the fascinating world of work and energy with our comprehensive MCQs.
MCQ Questions for Class 9 Science Chapter-10 Work and Energy MCQ’s with Answers
Q1. Work done is measured by:
(a) force x distance
(b) mass x velocity
(c) force x energy
(d) none of the these
Ans: Force x distance
Q2. Joule is the unit of:
(a)Mass
(b) Work
(c) Energy
(d) Velocity
Ans: work
Q3. A body at rest can have:
(a) Energy
(b) Power
(c) Momentum
(d) Velocity
Ans: Energy
Q4. Newton-metre is the unit of:
(a) Speed
(b) Energy
(c) Gravitational intensity
(d) Work
Ans: Work
Work and Energy Online MCQ’S Test
Q5. Ns is equivalent to
(a)Nm-1s
(b) kg ms-1
(c)kg ms-2
(d)kg ms-3
Ans: kg ms-1
Q6. Kg m2s-2 is associated with
(a) Work
(b) Speed
(c) Energy
(d) Momentum
Ans: Energy
Q7.A flying aeroplane possesses
(a) Only potential energy
(b) Only kinetic energy
(c) Both potential and kinetic energy
(d) None of these
Ans: Both potential and kinetic energy
Q8.The kinetic energy of a body is increased most by doubling its:
(a) Speed
(b) Density
(c) Weight
(d) Mass
Ans: Speed
Q9. A wound watch spring has:
(a)No energy stored in it
(b) Mechanical P.E. stored in it
(c) Mechanical K.E. stored in it
(d) None of these
Ans: Mechanical P.E. stored in it
Q10. In the oscillation of a simple pendulum, the sum of the P.E.andK.E. is:
(a) constant
(b) Minimum
(c) Maximum
(d) Infinitive
Ans: Constant
Q11. When the speed of a moving object is doubled, its:
(a) Weight is doubled
(b) Kinetic energy increased four times
(c) Kinetic energy is doubled
(d) None of these
Ans: Kinetic energy increased four times
Q12. The kinetic energy of the body decrease by 10% what is the percentage decreases in momentum
(a) 50
(b) 40
(c) 30
(d) None of these
Ans: None of these
Q13.The kinetic energy of a body decreases by 36% what is the percentage decrease in momentum
(a) 18
(b) 19
(c) 20
(d) 21
Ans: 20
Q14. The mass of a body P is twice that of body Q.,but the speed of half of that of Q. The Kinetic energies of p and q are in the ratio of
(a) 1 : 2
(b) 2 : 1
(c) 1 : 4
(d) 4 : 1
Ans: 1 : 2
Q15. A photocell converts light energy into:
(a) Physical energy
(b) chemical energy
(c) electrical energy
(d) heat energy
Ans: electrical energy
Q16. When the time is taken to complete a given amount of work increases
(a) energy increases
(b) power increases
(c) power decreases
(d) energy decreases
Ans: power decrease
Q17. Which of the following quantities is a measure of the amount of work done?
a) Power
b) Force
c) Energy
d) Work
Answer: d) Work
Q18. Work is defined as the product of:
a) Force and time
b) Distance and time
c) Force and displacement
d) Velocity and time
Answer: c) Force and displacement
Q19. Which of the following is a scalar quantity?
a) Work
b) Power
c) Force
d) Energy
Answer: a) Work
Q20. The SI unit of work is:
a) Newton
b) Joule
c) Watt
d) Kilogram
Answer: b) Joule
Q21. When work is done against friction, energy is:
a) Created
b) Destroyed
c) Transferred
d) Converted
Answer: c) Transferred
Q22. Which of the following statements is true about kinetic energy?
a) It depends on an object’s position.
b) It depends on an object’s velocity.
c) It depends on an object’s mass.
d) It depends on an object’s shape.
Answer: b) It depends on an object’s velocity.
Q23. Potential energy is the energy possessed by an object due to its:
a) Motion
b) Shape
c) Temperature
d) Position
Answer: d) Position
Q24. The law of conservation of energy states that:
a) Energy can be created but not destroyed.
b) Energy can be destroyed but not created.
c) Energy can neither be created nor destroyed.
d) Energy can be created and destroyed.
Answer: c) Energy can neither be created nor destroyed.
Q25. Which of the following energy conversions takes place in a solar panel?
a) Chemical energy to electrical energy
b) Mechanical energy to electrical energy
c) Light energy to electrical energy
d) Thermal energy to electrical energy
Answer: c) Light energy to electrical energy
Q26. Which of the following devices converts electrical energy into mechanical energy?
a) Generator
b) Motor
c) Battery
d) Solar panel
Answer: b) Motor
Q27. Which of the following forms of energy is associated with the motion of molecules?
a) Gravitational potential energy
b) Nuclear energy
c) Thermal energy
d) Chemical potential energy
Answer: c) Thermal energy
Q28. The energy stored in a stretched rubber band is an example of:
a) Potential energy
b) Kinetic energy
c) Mechanical energy
d) Electrical energy
Answer: a) Potential energy
Q29. Which of the following statements is true about power?
a) Power is the rate of doing work.
b) Power depends on the distance covered.
c) Power is a scalar quantity.
d) Power is measured in joules.
Answer: a) Power is the rate of doing work.
Q30. A car traveling at a higher speed has __ kinetic energy compared to the same car traveling at a lower speed.
a) Less
b) More
c) The same amount of
d) No
Answer: b) More
Q31. When a ball is thrown upwards, its potential energy _ and its kinetic energy _.
a) Increases, decreases
b) Decreases, increases
c) Stays the same, stays the same
d) Decreases, stays the same
Answer: b) Decreases, increases