Verified Solution • 2025–26 Session moderate

QAIPMT-2007-Ph-2374: NEET 2007 Physics - Class 12 AIPMT-2007-Ph-2374 Solution: In a mass spectrometer used for measuring the masses of ions…

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 (mass of the ion/charge on the ion) will be proportional to

1/R^2

R^2

1/R

Multiple Choice Options

A 2.4 $\times$ _ 10 8 m/s
B 3.0 $\times$ _ 10 8 m/s
C 1.2 $\times$ _ 10 8 m/s
D 1.8 $\times$ _ 10 8 m/s

Step-by-Step Verified Solution

As 1 _ = sin _ i sin _ 90 _ _ _ = 1 sin _ i = 5 3 Speed, v = c _ = 3 _ 10 8 5 / 3 = 1.8 _ 10 8 m/s

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