Work Energy and Power MCQ Questions Class 11 Physics Chapter 6
NCERT MCQ Questions for Class 11 Physics Chapter 6 Work Energy and Power. Work Energy and Power MCQ Questions with Answers from Class 11 Physics.
Work Energy and Power MCQ Questions Class 11 Physics Chapter 6
Work Energy and Power Multiple Choice Questions with Answers Class 11 Physics Chapter 6 PDF is available.
1) The quantities which are involved in scalar product are
a) Both vectors
b) Both scalars
c) One scalar and other vector
d) None
Ans: a) both vectors
2) The scalar product of two vectors is the
a) Vector
b) Scalar
c) Tensor
d) None
Ans: b) scalar
3) The quantities which are involved in vector product are
a) Both scalar
b) Both vector
c) One scalar one vector
d) None
Ans: b) both vector
4) The vector product of two vectors is
a) Vector
b) Scalar
c) Tensor
d) None
Ans: a) scalar
5) The scalar product is given by
a) A•B = AB sinx
b) A×B = AB sinx
c) A•B = AB cosx
d) A×B = AB cosx
Ans: c) A•B = AB Cosx
6) Scalar product is
a) Commutative
b) Not commutative
c) Both a and b
d) None
Ans: a) commutative
7) Scalar product is commutative means
a) A•B = A•B
b) A•B = B•A
c) Both a and b
d) None
Ans: b) A•B = B•A
8) Scalar product also obeys
a) Distributive law
b) Not obey distributive law
c) Both a and b
d) None
Ans: a) distributive law
9) The scalar product obeys distributive law means
a) A•( B + C) = A•B + A•C
b) A×(B + C) = A×B + A×C
c) Both a and b
d) None
Ans: a) A • (B + C) = A•B + A•C
10) For unit vector i, j, k
a) i•i = j•j = k•k = 1
b) i•j = j•k = k•i = 0
c) Both a and b
d) None
Ans: c) both a and b
11) The scalar product A•A =
a) A2
b) A
c) Both a and b
d) None
Ans: a) A2
12) If the vectors A and B are perpendicular to each other then
a) A•B = 1
b) A•B = 0
c) Both a and b
d) None
Ans: b) A•B = 0
13) If the scalar product A•B = 0 then
a) Vectors A and B are parallel
b) Vectors A and B are perpendicular
c) Both a and b
d) None
Ans: b) vectors A and B are perpendicular
14) The change in kinetic energy of the particle is equal to
a) Work done in it
b) Work done on it by the net force
c) Both a and b
d) None
Ans: b) work done on it by the net force
15) Work done is given by
a) W = F•d
b) W = F×d
c) W = FD
d) None
Ans: a)W = F•d
16) Work down is the scalar product of
a) Force and displacement vectors
b) Force and distance
c) Both a and b
d) None
Ans: a) force and displacement vectors
17) The kinetic energy of the object is given by
a) 1/2mv
b) 1/2mv2
c) mv2
d) Mv
Ans: b) 1/2mv2
18) The potential energy of the object is given by
a) Mg
b) Mgh
c) 1/2mv2
d) Mv
Ans: b) mgh
19) The total mechanical energy of a system is conserved if the forces doing work in it are ____
a) Not conservative
b) Conservative
c) Both a and b
d) None
Ans: b) conservative
20) The spring force is a
a) Not conservative force
b) Conservative force
c) Both a and b
d) None
Ans: b) conservative force
- In case you have missed:- Previous Chapter MCQ Questions
21) Frictional force is
a) A conservative force
b) Not a conservative force
c) Both a and b
d) None
Ans: b) not a conservative force
22) The reaction in which heat energy is released is called as
a) Endothermic reaction
b) Exothermic reaction
c) Both a and b
d) None
Ans: b) exothermic reaction
23) The reaction in which heat energy is absorbed is called as
a) Endothermic reaction
b) Exothermic reaction
c) Both a and b
d) None
Ans: a) endothermic reaction
24) The time rate at which work is done or energy is transferred is called as
a) Force
b) Work
c) Heat energy
d) Power
Ans: d) power
25) Power is the
a) Vector quantity
b) Scalar quantity
c) Both a and b
d) None
Ans: b) scalar quantity
26) Energy is the
a) Vector quantity
b) Scalar quantity
c) Both a and b
d) None
Ans: b) scalar quantity
27) Work is the
a) Scalarquantity
b) Vector quantity
c) Both a and b
d) None
Ans: a) scalar quantity
28) The SI unit of power is
a) Watt
b) Joule
c) N
d) NS
Ans: a) watt
29) 1hp =
a) 746kW
b) 746W
c) 746J
d) 746kJ
Ans: b) 746W
30) 1KWh =
a) 3.6*10-6J
b) 3.6*106 J
c) 3*106J
d) None
Ans: b) 3.6*106J
31) A collision in which the two particles move together after the collision is called
a) Elastic collision
b) Inelastic collision
c) Completely elastic collision
d) None
Ans: c) completely elastic collision
32) If the initial velocities and final velocities of both the bodies are along the same straight line then it is called as
a) One dimensional collision
b) Head on collision
c) Both a and b
d) None
Ans: c) both a and b
33) In the equation F = -kx, k is called as
a) Force constant
b) Spring constant
c) Constant
d) None
Ans: b) spring constant
34) The SI unit of spring constant is
a) Nm
b) N/m
c) N
d) None
Ans: b) N/m
35) The work energy theorem hold in
a) Particular inertial frames
b) In all inertial frames
c) Both a and b
d) None
Ans: b) in all inertial frames
36) The dimensions of spring constant are
a) [M T2]
b) [M T-2]
c) [M T]
d) None
Ans: b) [ M T-2]
37) The dimensions of power are
a) [M L2 T3]
b) [M L2 T-3]
c) [M L T]
d) None
Ans: b) [M L2 T-3]
38) The dimensions of work are
a) [M L2 T-2]
b) [M L2 T]
c) [M L T]
d) None
Ans: a) [M L2 T-2]
39) Kinetic energy, potential energy and mechanical energy is measured in
a) Watt
b) Joule
c) N
d) None
Ans: b) joule
40) The dimensions of kinetic energy are
a) [M L T]
b) [M L2 T-2]
c) [M L2 T]
d) None
Ans: b) [M L2 T-2]
- In case you have missed:- Next Chapter MCQ Questions