SSC MTS EXAM

Detailed explanation-1: -Since the direction of positively charged alpha particle is towards west, the direction of current will be the same i.e., towards west. Again, the direction of magnetic force is towards north. Hence, according to Fleming’s left hand rule, the direction of magnetic field will be upwards.

Detailed explanation-2: -If an electron projected towards west is deflected towards north by a magnetic field that means the direction of current in west and the direction of force in north. So, the forefinger shows the direction of field is upward. Hence, The direction of field will be upward.

Detailed explanation-3: -A positiveiy charged particle (alpha particles) projected towards west is deflected towards north by magnetic field.

Detailed explanation-4: -The direction of current is along the direction of motion of the -particle(east to west). The direction of the magnetic field is into the paper. Therefore, by using Fleming’s left-hand rule, the force is directed into the page south. So, the particle will be deflected towards the south.