An electron is moving along positive x - axis. A uniform electric field exists towards negative y - axis. What should be the direction of magnetic field of suitable magnitude so that net force on electron is zero?

Positive z-axis

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Negative z-axis

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Positive y-axis

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Negative y-axis

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B
Negative z-axis

Electrostatic force on electron should be equal and opposite to magnetic field,i.e.,
$_{e} = -_{m}$

Or $q \to E = - q (\to v \times \to B)$

Or $\to E = - (\to v \times \to B)$

So, $\to B$ should be along negative $z$ - axis.

Suggest Corrections

Similar questions

An electron is moving along positive x - axis. A uniform electric field exists towards negative y - axis. What should be the direction of magnetic field of suitable magnitude so that net force on electron is zero?

Q. An electron is moving along positive x-axis. A uniform electric field exists towards negative y-axis. What should be the direction of magnetic field of suitable magnitude so that net force on the electron is zero.

Q. An electron is moving along the positive x-axis. You want to apply a magnetic field for a 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 :

Q. An electron is moving with a uniform speed in the X - Y plane in a straight path along the negative X direction. If a uniform magnetic field is applied parallel along the positive z-axis, the electron will :

Q. The force on a charged particle due to electric and magnetic fields is given by

\vec{F} = q \vec{E} + q \vec{ν} \times \vec{B}

. Suppose

\vec{E}

is along the X-axis and

\vec{B}

along the Y-axis. In what direction and with what minimum speed ν should a positively charged particle be sent so that the net force on it is zero?

Join BYJU'S Learning Program

An electron is moving along positive x - axis. A uniform electric field exists towards negative y - axis. What should be the direction of magnetic field of suitable magnitude so that net force on electron is zero?

The correct option is B Negative z-axisElectrostatic force on electron should be equal and opposite to magnetic field,i.e., →Fe=−−→Fm Or q→E=−q(→v×→B) Or →E=−(→v×→B) So,→B should be along negative z- axis.

The correct option is B
Negative z-axis

Electrostatic force on electron should be equal and opposite to magnetic field,i.e.,
$_{e} = -_{m}$

Or $q \to E = - q (\to v \times \to B)$

Or $\to E = - (\to v \times \to B)$

So, $\to B$ should be along negative $z$ - axis.