Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismMagnetic ForceEasy2 minPYQ_2020
PhysicsEasysingle choice

An electron moves with a constant velocity inside a charged parallel plate capacitor as shown in the figure. The space between the plates is filled with a constant magnetic fieldB. The plates are having surface charge densities+σand-σrespectively. The time in which the electron comes out from the capacitor is

Options:

Answer:
B
Solution:

| F → e | = | F → m |

∴ q E = B q v

∴ v = F B

t=l⁡v=l⁡BE=l⁡Bσ/ε0=ε0l⁡Bσ

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:MagnetismSubtopic:Magnetic Force
⏱ 2mℹ️ Source: PYQ_2020

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