# 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

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

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

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/2?r
B zero
C force between them × 2?r
D force between them × r

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

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