Moving Charges ...

An electron is moving on a circular path of radius $$r$$ with speed $$v$$ in a transverse magnetic field $$B$$. $$e/m$$ for it will be 

When a magnetic field is applied in a direction perpendicular to the direction of cathode rays, then their

A particle is moving in a uniform magnetic field, then

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

Motion of a moving electrons is not affected by

Two long straight parallel conductors separated by a distance of $$0.5\ m$$ carry currents of $$5A$$ and $$8A$$ in the same direction. The force per unit length experienced by each other is

An electron is travelling in east direction and a magnetic field is applied in upward direction then electron will deflect in

Two parallel wires in free space are $$10\ cm$$ apart and each carries a current of $$10\ A$$ in the same direction. The force one wire exert on the other per meter of length is

A electron $$(q=1.6\times 10^{-19}C)$$ in moving at right angle to the uniform magnetic field $$3.534\times 10^{-5}T$$. The time taken by the electrons to complete a circular orbit is

The magnetic field near a current carrying conductor is given by