Q. 85.0( 1 Vote )

Two ions have equal masses but one is singly ionized and the other is doubly ionized. They are projected from the same place in a uniform magnetic field with the same velocity perpendicular to the field.
A. Both ions will go along circles of equal radii.

B. The circle described by the singly ionized charge will have a radius double that of the other circle.

C. The two circles do not touch each other.

D. The two circles touch each other.

Answer :

Formula used: Radius of the orbit of a particle is given by



Where r is radius of the orbit


m is mass


v is velocity


q is electric charge


B is electric field


Radius r is inversely proportional to the charge. So singly ionized charge will have a double radius than doubly ionized charge. And both the charges are projected from the same place. So they will touch each other at the beginning. So options B and D are correct.

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