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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismMagnetic ForceMedium2 minPYQ_2007

PhysicsMediumsingle choice

In a mass spectrometer 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:NEET 2007

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Solution:

Radius of semicircular path $R = \frac{m v}{qB} = \frac{2 m q V}{qB}$ As $V$ and $B$ are constant so $R \propto \frac{m q}{q} \Rightarrow \frac{q}{m} \propto \frac{1}{R ^{2}}$

Stream:NEETSubject:PhysicsTopic:MagnetismSubtopic:Magnetic Force

⏱ 2mℹ️ Source: PYQ_2007

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