An electric charge moving in a direction making an angle `phi(ne90^@`) with the direction of magnetic field follows a helical path. Why?

A bar of diamagnetic material is placed in a magnetic field with its length making an angle of 30^@ with the direction of the magnetic field. How will the bar behave?

A bar of diamagnetic substance is placed in a magnetic field with its length making angle theta with the direction of the magnetic field. How will the bar behave ?

Discuss the motion of charged particle in uniform magnetic field, when its moves at an angle theta with the direction of magnetic field. Prove that its path is helical. Calculate the pitch of helical path. What will be the nature of path if theta=90^@

Discuss the motion of a charged particle in uniform magnetic field, when it moves at an angle 0 with the direction of magnetic field. Prove that its path is helical.Calculate the pitch of the helical path.What will be the nature of the path, if (i) theta = 0^@ and (ii) theta = 180^@ ?

A proton having charge e enters a magnetic field of strength B with a velocity v in a direction making angle theta with the direction of the field. The force on proton is