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Solution


Q.

An electron is moving along the positive x-axis. If the uniform magnetic field is applied parallel to the negative z-axis, then           [2023]

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 options given below:
1 B and E only  
2 A and E only  
3 C and D only  
4 B and D only  

Ans.

(1)

F→=-e(v→×B→)

Force will be along the negative y-axis.

As magnetic force is perpendicular to velocity, the path of the electron must be a circle.