1.

There is a beam of electrons and protons in whichboth the particles are moving with the same velocity, entering a thin region, where a uniform magnetic field is applied perpendicular to the motion of beam. The protons and the electrons

Answer»

will be deviated in the same direction
will be deviated in opposite directions with a different angle of deviation
will be deviated in an opposite direction with a same angle of deviation
will not deviate

Solution :First of all, the magnetic FORCE ACTING on electrons and protons will be along opposite directions and hence, both the particles will deviate along opposite directions. Angle of deviation in the FIELD will depend on the radius of circular path it will traverse inside the magnetic field, which is `r = mv //qB`. Here, MASSES of both the particles are different and hence, the radius will be different and thus, the angle of deviation will be different too. So, option (b) is correct.


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