NCERT Class 11 Physics General Awareness Questions with Answers

NCERT Class 11 Physics General Awareness Questions with Answers NCERT Class 11 Physics QUESTIONS

NCERT Class 11 Physics General Awareness Questions with Answers

61 S is the surface of a lump of magnetic material.
A Lines of H cannot all be continuous across S.
B Lines of H are necessarily continuous across S.
C Some lines of B must be discontinuous across S.
D Lines of B are not necessarily continuous across S.

Answer: Lines of H cannot all be continuous across S.
62 Which of the following types of force can do no work on the particle on which it acts?
A Centripetal force
B Elastic force
C Gravitational force
D Frictional force

Answer: Centripetal force
63 When a force is parallel to the direction of motion of the body, then work done on the body is.
A maximum
B infinity
C zero
D minimum

Answer: maximum
64 Equipotentials at a great distance from a collection of charges whose total sum is not zero are approximately
A spheres
B ellipsoids
C planes
D paraboloids

Answer: spheres
65 If a charged particle moves through a magnetic field perpendicular to it
A both momentum and energy of particle change.
B momentum as well as energy are constant.
C energy is constant but momentum changes.
D momentum is constant but energy changes.

Answer: energy is constant but momentum changes.
66 Consider a wire carrying a steady current, I placed in a uniform magnetic field B perpendicular to its length. Consider the charges inside the wire. It is known that magnetic forces do not work. This implies that,
A motion of charges inside the conductor is unaffected by B, since they do not absorb energy.
B Some charges inside the wire move to the surface as a result of B.
C if the wire moves under the influence of B, no work is done by the force.
D If the wire moves under the influence of B, no work is done by the electric force on the ions, assumed fixed within the wire.

Answer: Some charges inside the wire move to the surface as a result of B.
67 Two small spheres each carrying a charge q are placed r metre apart. If one of the spheres is taken around the other one in a circular path of radius r, the work done will be equal to
A force between them/2πr
B zero
C force between them × 2πr
D force between them × r

Answer: zero
68 A field in which the work is done in a moving body along a closed path is zero is called.
A Conservative field
B Electromagnetic field
C Electric field
D None of the above

Answer: Conservative field
69 The force that is not one of the conservative forces is
A elastic spring force
B gravitational force
C frictional force
D electric force

Answer: frictional force
70 What exactly is a conservative force conserving?
A Energy
B Acceleration
C Force
D Velocity

Answer: Energy

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