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Moving Charges And Magnetism

Question
CBSEENPH12037697

A narrow stream of protons and deuterons, having the same momentum values, enter a region of uniform magnetic field directed perpendicular to their common direction of motion. What would be the ratio of the radii of the circular paths, described by the protons and deutrons?

Solution

We are given, stream of protons and deutrons haveing same momentum entering a region of uniform magnetic field perpendicular to the direction of motion.

Charge on deutron is twice as that of proton.

Using the formula, 
                         r = mvqB 
                rprD = qDqp = 2qq =2 
Ratio of the radii of proton to deutron is 2:1 .