1. Tardigrade
  2. Question
  3. Physics
  4. A proton moves in the positive z-direction after being accelerated from rest through a potential difference V. The proton then passes through a region with a uniform electric field E in the positive x-direction and a uniform magnetic field B in the positive y-direction, but the proton's trajectory is not affected. If the experiment were repeated using a potential difference of 2 V, the proton would then be

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Q. A proton moves in the positive $z$-direction after being accelerated from rest through a potential difference $V$. The proton then passes through a region with a uniform electric field $E$ in the positive $x$-direction and a uniform magnetic field $B$ in the positive $y$-direction, but the proton's trajectory is not affected. If the experiment were repeated using a potential difference of $2 V$, the proton would then be

Moving Charges and Magnetism

Solution:

The electrostatic force on proton is along positive $x$-axis and the magnetic force is along negative $x$-axis. Initially net force on charge $Q$ is zero. Since the velocity of proton is increased in repeat experiment, the magnetic force on proton shall increase and the proton would then be deflected in negative $x$-direction.