Problem

Two particles

X

and

Y

having equal charges, after being accelerated through the same potential difference, enter a region of uniform magnetic field and describe circular paths of radii

R_1

and

R_2

, respectively. The ratio of the mass of

X

to that of

Y

is (a)

(R_1/R_2)^{1/2}

(b)

R_2/R_1

(c)

(R_1/R_2)^2

(d)

R_1/R_2

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