Magnetics 1 Question 12

12. Two particles A and B of masses mA and mB respectively and having the same charge are moving in a plane. A uniform magnetic field exists perpendicular to this plane. The speeds of the particles are vA and vB, respectively and the trajectories are as shown in the figure. Then

(2001, 2M)

(a) mAvA<mBvB

(b) mAvA>mBvB

(c) mA<mB and vA<vB

(d) mA=mB and vA=vB

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Answer:

Correct Answer: 12. (b)

Solution:

  1. Radius of the circle =mvBq or radius mv if B and q are same.

( Radius )A>( Radius )BmAvA>mBvB



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