Q3 of 91 Page 228

Will a current loop placed in a magnetic field always experience a zero force?

Effect of the magnetic force on a current loop is totally based on the uniformity of the magnetic field. If the field is non uniform, then current loop will not experience a force. So magnetic force on the loop will be zero. If the field is uniform, then the force experienced on the current loop either zero or non zero.


More from this chapter

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1

Suppose a charged particle moves with a velocity v near a wire carrying an electric current. A magnetic force, therefore, acts on it. If the same particle is seen from a frame moving with velocity v in the same direction, the charge will be found at rest. Will the magnetic force become zero in this frame? Will the magnetic field become zero in this frame?

 2

Can a charged particle be accelerated by a magnetic field? Can its speed be increased?

 4

The free electrons in a conducting wire are in constant thermal motion. If such a wire, carrying no current, is placed in a magnetic field, is there a magnetic force on each free electron? Is there a magnetic force on the wire?

 5

Assume that the magnetic field is uniform in a cubical region and is zero outside. Can you project a charged particle from outside into the field so that the particle describes a complete circle in the field?