Physics - Magnetism Question with Solution | TestHub

the radius of path of a charged particle moving in a uniform magnetic field is proportional to the momentum of the particle

an electron beam is moving towards east, on which a perpendicular magnetic field is acting upwards. The beam will be deflected towards the north direction

a positive charge is going straight away from the observer. The magnetic line of force produced due to it are in clockwise direction.

while passing through a given place, the path of electron remains straight line. It can be definitely said that the magnetic field is not present at that place