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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismMagnetic ForceEasy2 minPYQ_2020

PhysicsEasysingle choice

If magnetic field is along $+ z -$ axis and a potential difference is applied across an ionized gas chamber placed in the $x - y$ plane, then

(i) Magnetic force on positive ions will act along $+ y$ axis

(ii) Magnetic force on electrons will act along $+ y$ axis

Options:

Answer:

Solution:

Force on $+ v e$ ions $= q (v \times B)$

$= q (v \hat{i} \times B \hat{k}) = q v B (- \hat{j})$

Force on electrons $= - q (v \times B)$

$= - q (v (- \hat{i}) \times B \hat{k}) = q v B (- \hat{j})$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:MagnetismSubtopic:Magnetic Force

⏱ 2mℹ️ Source: PYQ_2020

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