JEE Main 2026 Physics question
A particle of charge q and mass m is projected from origin with an initial velocity . There exists a uniform magnetic field and a space varying electric field within the region 0≤x≤L. After travelling a distance such that the x-coordinate has changed from x=0 to x=L, the change in the kinetic energy is .
Answer: (A)
Solution
The magnetic force does no work. Since the electric force depends only on x, the work
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