Moving Charges ...

Two charge particles  each of mass $$m$$ and charge $$q$$ are projected in a uniform magnetic field $$B$$ with the same speed as such planes of motion of particles are perpendicular to magnetic field $$B$$, then 

Two charged particles $$M$$ and $$N$$ are projected with same velocity in a uniform magnetic field. Then $$M$$ and $$N$$ are :

If an electron describes half a revolution in a circle of radius $$r$$ in a magnetic field $$B$$, the energy acquire by it is :

The restoring couple in the moving coil galvanometer is because of :

A beam consisting of protons and electrons moving at the same speed goes through a thin region in which there is a magnetic field perpendicular to the beam. The protons and the electrons 

A particle of mass $$m$$ and charge $$Q$$ moving with velocity $$\vec {v}$$ describe a circles path of radius $$R$$ when subjected to a uniform transverse magnetic field of inductance $$B$$.The work done by the field when the particle completes one of circle is : 

If a charged particle of charge $$5\ \mu C$$ and mass $$5\ g$$ is moving with constant speed $$5\ m/s$$ in a uniform magnetic field $$B$$ on a curve $$x^2+y^2=25$$, where $$x$$ and $$y$$ are in metre. The value of magnetic field will be :

A charge particle follows a helical path of unequal path in a magnetic field. This means that :

Only the current  inside the amperian loop contributes in

A charged enters a region of uniform magnetic field at an angle to the magnetic line of force . The path of the particle is a circle .