MCQ Questions | Class 9 Science Chapter 11 | Work, Power And Energy with Answers

MCQ | Work, Power And Energy Class 9 | Part-3

Check the below NCERT MCQ Questions for Class 9 Science Chapter 11 Work, Power And Energy with Answers Pdf free download. MCQ Questions for Class 9 Science with Answers were prepared based on the latest exam pattern. We have Provided Work, Power And Energy Class 9 Science MCQs Questions with Answers to help students understand the concept very well.

Objective Question | NCERT Science Class 9

NCERT Solutions Class 9 Science
Book:	National Council of Educational Research and Training (NCERT)
Board:	Central Board of Secondary Education (CBSE)
Class:	9th
Subject:	Science
Chapter:	11 ( Part-3 )
Chapters Name:	Work, Power And Energy
Medium:	English

Ncert Solutions for Class 9 Science | Objective Type Questions

You can refer to NCERT Solutions for Class 9 Science Chapter 11 Work, Power And Energy to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Q1.	Work done is said to be positive when a force causes displacement:
	A. In its own direction
	B. In the direction opposite to the applied force
	C. In the direction at right angles to the direction of applied force
	D. None of the above

Q2.	Two masses m and 2m are dropped from certain height ‘h’. Then on reaching the ground,
	A. K.E. of them will be equal
	B. K.E. of the heavier is 4 times the K.E. of the lighter
	C. K.E. of the lighter is 4 times the K.E. of the heavier
	D. K.E. of the heavier is more than that of the lighter

Q3.	A rocket rises up in the air due to the force generated by the fuel. The work done by the:
	A. fuel is negative work and that of force of gravity is positive work
	B. fuel is positive work and that of force of gravity is negative work
	C. both fuel and force of gravity do positive work
	D. both fuel and force of gravity do negative work

Q4.	A body is moved through a distance of 3 m in the following different ways. In which case is the maximum work done?
	A. when pushed over an inclined plane
	B. when lifted vertically upward
	C. when pushed over smooth rollers
	D. when pushed on a plain horizontal surface

Q5.	In winters, rubbing of hands together for some time, causes a sensation of warmth mainly because of
	A. heat caused by the force of friction
	B. heat caused by the momentum
	C. heat caused by the motion
	D. heat flows from the blood to skin

Q6.	An electric lamp of 100w is used for 5 hours per day calculate the units of energy consumed by lamp in one day
	A. 1 unit
	B. 0.5 unit
	C. 1.5 units
	D. none of these

Q7.	One unit of electricity is consumed by A : P = 40 W bulb used for t = 25 hours B : P = 20 W bulb used for t = 50 hours Both A and B are true as, energy E in kWh is best related as
	A. E = Pt
	B. E = Pt/1000
	C. E = P/1000
	D. E = t/1000

Q8.	Work done by the gravitational force of earth on a satellite along a circular path is
	A. O
	B. minimum
	C. max
	D. all of these

Q9.	In which case work is not done:
	A. A girl swimming in a pond
	B. A windmill lifting water from a well
	C. A standing man holding a suit case in his hand
	D. A sail boat moving in the direction of wind

Q10.	A boy holds a mass on his stretched hand. Then
	A. Work done against gravity is zero.
	B. Muscular energy is used
	C. Both (a) and (b)
	D. Neither (a) nor (b)

MCQ Questions | Class 9 Science Chapter 11

MCQ Questions | Class 9 Science Chapter 11 | Work, Power And Energy with Answers

MCQ | Work, Power And Energy Class 9 | Part-3

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