Q78 / 90 · JEE Main 2023 (13 Apr Shift 2) · Physics
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:
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:
- A
A and E only
- B
C and D only
- Correct answerC
B and E only
- D
B and D only
Solution
The Lorentz force is given by
So, .
As the magnetic field is perpendicular to the velocity, motion would be circular.
Hence, the correct answer is option: 'C'.