magnetism

Related Questions

• Magnets A and B are geometrically similar but the magnetic moment of A is twice that of B. If $T_1$ and $T_2$ be the time periods of the oscillation when their like poles and unlike poles are kept together respectively, then $\frac{{{T_1}}}{{{T_2}}}$will be

  ---

• A magnet of length 0.1 m and pole strength ${10^{ - 4}}A.m.$ is kept in a magnetic field of $30\,Wb/{m^2}$ at an angle 30°. The couple acting on it is ……… $ \times {10^{ - 4}}Nm.$

  ---

• A bar magnet of length 3 cm has points A and B along its axis at distances of 24 cm and 48 cm on the opposite sides. Ratio of magnetic fields at these points will be

  ---

• Force between two identical bar magnets whose centres are rmetre apart is 4.8 N, when their axes are in the same line. If separation is increased to 2r, the force between them is reduced to

  ---

• Tangent galvanometer is used to measure

  ---