CBSE Class 11 Physics Chapter 6 Work, Energy and Power Multiple Choice Questions with Answers. MCQ Questions Class 11 Physics Work, Energy and Power with Answers was Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 11 Physics Work, Energy and Power MCQs with Answers to know their preparation level.
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MCQ Questions Class 11 Physics Work, Energy and Power with Answers - Set - 4
Question 1:
The engine of a vehicle delivers constant power. If the vehicle is moving up the inclined plane then, its velocity,
(a) must remain constant
(b) must increase
(c) must decrease
(d) may increase, decrease or remain same.
Correct Answer – (A)
Question 2 :
A particle moving in the xy plane undergoes a displacement of sr = (2iˆ +3 ˆj) while a constant force F = (5iˆ+2 ˆj) r N acts on the particle. The work done by the force F is
(a) 17 joule
(b) 18 joule
(c) 16 joule
(d) 15 joule
Correct Answer – (C)
Question 3 :
Calculate the work done on the tool by F r if this displacement is along the straight line y = x that connects these two points.
(a) 2.50 J
(b) 500 J
(c) 50.6 J
(d) 2 J
Correct Answer – (C)
Question 4 :
A particle moves under the effect of a force F = cx from x = 0 to x = x1, the work done in the process is
(a) 2 cx1
(b) 2 1 1 cx 2
(c) 2 2 cx1
(d) zero
Correct Answer – (B)
Question 5 :
The work done in stretching a spring of force constant k from length l1 and l2 is
(a) k( 2 ) 1 2 l 2 – l
(b) k( ) 2 1 2 1 2 l 2 – l
(c) k(l 2 – l1)
(d) ( ) 2 k l 2 + l1
Correct Answer – (B)
MCQ Questions Class 11 Physics Work, Energy and Power with Answers
Question 6 :
A particle describe a horizontal circle of radius 0.5 m with uniform speed. The centripetal force acting is 10 N. The work done in describing a semicircle is
(a) zero
(b) 5 J
(c) 5 p J
(d) 10 p J
Correct Answer – (A)
Question 7 :
Calculate the work done on the tool by F r if the tool is first moved out along the x-axis to the point x = 3.00m, y = 0 and then moved parallel to the y-axis to x = 3.00m, y = 3.00
(a) 67.5 J
(b) 85 J
(c) 102 J
(d) 7.5 J
Correct Answer – (A)
Question 8 :
A ball of mass m moves with speed V and strikes a wall having infinite mass and it returns with same speed, then the workdone by the ball on the wall is
(a) zero
(b) mvJ
(c) m/v J
(d) v/m J
Correct Answer – (A)
Question 9 :
A body of mass 3 kg is under a constant force which causes a displacement s in metre in it, given by the relation t2 3 s = 1 ,is in second. Work done by the force in 2 second is
(a) J 8 3
(b) J 3 8
(c) J 5 19
(d) J 19 5
Correct Answer – (B)
Question 10 :
A particle is taken round a circle by application of force. The work done by the force is
(a) positive non–zero
(b) negative non–zero
(c) Zero
(d) None of these
Correct Answer – (C)
- NCERT Solutions Class 11 Physics Chapter 1 : Physical world
- NCERT Solutions Class 11 Physics Chapter 2 : Units And Measurements
- NCERT Solutions Class 11 Physics Chapter 3 : Motion In A Straight Line
- NCERT Solutions Class 11 Physics Chapter 4 : Motion In A Plane
- NCERT Solutions Class 11 Physics Chapter 5 : Laws of Motion
- NCERT Solutions Class 11 Physics Chapter 6 : Work Energy Power
- NCERT Solutions Class 11 Physics Chapter 7 : Rotational-Motion
- NCERT Solutions Class 11 Physics Chapter 8 : Gravitation
- NCERT Solutions Class 11 Physics Chapter 9 : Mechanical Properties of Solids
- NCERT Solutions Class 11 Physics Chapter 10 : Mechanical Properties of Fluids
- NCERT Solutions Class 11 Physics Chapter 11 : Thermal Properties of Matter
- NCERT Solutions Class 11 Physics Chapter 12 : Thermodynamics
- NCERT Solutions Class 11 Physics Chapter 13 : Kinetic Theory
- NCERT Solutions Class 11 Physics Chapter 14 : Oscillations
- NCERT Solutions Class 11 Physics Chapter 15 : Waves
