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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2007
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In a mass spectrometer used for measuring the masses of ions, the ions are initially accelerated by an electric potential V and then made to describe semicircular paths of radius R using a magnetic field B. If V and B are kept constant, the ratio $\frac{Charge\; on\; the ion}{mass\; of\; the\; ion}$ will be proportional to :-


( A ) $\frac{1}{R}$
( B ) $R^2$
( C ) R
( D ) $\frac{1}{R^2}$

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