An electron is moving along the positive $X$ -axis. You want to apply a magnetic field for the short time so that the electron may reverse its direction and move parallel to the negative $X$ -axis. This can be done by applying the magnetic field along :

Y

-axis

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Z

-axis

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Y

-axis only

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Z

-axis only

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Solution

The correct options are
A $Y$ -axis
B $Z$ -axis
Force on charged particle due to magnetic field is
$F = q (\to v \times \to B)$
Hence, to reverse the direction of electron from positive X-axis to the direction parallel to the negative X-axis, magnetic field should be applied along Y-axis or Z-axis.

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An electron is moving along the positive X-axis. You want to apply a magnetic field for the short time so that the electron may reverse its direction and move parallel to the negative X-axis. This can be done by applying the magnetic field along :

The correct options are A Y-axis B Z-axisForce on charged particle due to magnetic field isF=q(→v×→B)Hence, to reverse the direction of electron from positive X-axis to the direction parallel to the negative X-axis, magnetic field should be applied along Y-axis or Z-axis.

An electron is moving along the positive $X$ -axis. You want to apply a magnetic field for the short time so that the electron may reverse its direction and move parallel to the negative $X$ -axis. This can be done by applying the magnetic field along :

The correct options are
A $Y$ -axis
B $Z$ -axis
Force on charged particle due to magnetic field is
$F = q (\to v \times \to B)$
Hence, to reverse the direction of electron from positive X-axis to the direction parallel to the negative X-axis, magnetic field should be applied along Y-axis or Z-axis.