Moving Charges and Magnetism

Related Questions

• The magnetic induction at the centre O in the figure shown is

  ---

• A charged particle of mass m and charge q describes circular motion of radius r in a uniform magnetic field of strength B. The frequency of revolution is

  ---

• A rectangular coil $20\,cm \times 20\,cm$ has 100 turns and carries a current of 1 A. It is placed in a uniform magnetic field B =0.5 T with the direction of magnetic field parallel to the plane of the coil. The magnitude of the torque required to hold this coil in this position is

  ---

• An electron moves in a circular orbit with a uniform speed v. It produces a magnetic field B at the centre of the circle. The radius of the circle is proportional to

  ---

• A small cylindrical soft iron piece is kept in a galvanometer so that

  ---