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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismMagnetic ForceEasy2 minPYQ_2023
PhysicsEasysingle choice

An electron is moving along the positive x-axis. If uniform magnetic field is applied parallel to the negative z-axis, then

A.The electron will experience magnetic force along positive y-axis

B.The electron will experience magnetic force along negative y-axis

C.The electron will not experience any force in magnetic field

D.The electron will continue to move along the positive x-axis

E.The electron will move along circular path in magnetic field

Choose the correct answer from the option given below:

Options:

Answer:
C
Solution:

The Lorentz force is given by

F=qv×B

=-ev×B

So, F^=i^×k^=-j^.

F is  along -y axis 

As the magnetic field is perpendicular to the velocity, motion would be circular.

Stream:JEESubject:PhysicsTopic:MagnetismSubtopic:Magnetic Force
2mℹ️ Source: PYQ_2023

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