NCERT Class 11 Physics General Awareness Questions with Answers
61 S is the surface of a lump of magnetic material.
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?
Answer: Centripetal force
63 When a force is parallel to the direction of motion of the body, then work done on the body is.
64 Equipotentials at a great distance from a collection of charges whose total sum is not zero are approximately
65 If a charged particle moves through a magnetic field perpendicular to it
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,
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
68 A field in which the work is done in a moving body along a closed path is zero is called.
Answer: Conservative field