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Question
The magnetic field is perpendicularly into the plane of the paper and a few charged particles are projected in it. Which of the following statement is true?
The Magnetic Field Is Perpendicularly Into The Plane Of The ...
 
Options:
A .  A represents proton and B and electron
B .  Both A and B represent protons but velocity of A is more than that of B
C .  Both A and B represents protons but velocity of B is more than that of A
D .  Both A and B represent electrons, but velocity of B is more than that of A
Answer: Option C
:
C
Both particles are deflecting in same direction so they must be of same sign.(i.e., both A and B represents protons)
By using r=mvqBrv
From given figure radius of the path described by particle B is more than that of A.
Hence vB>vA.

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