Question

An electron moves in a negative x direction through a uniform magnetic field in a negative y axis. What will be the direction of magnetic force acting on the electron?

Answer 1

Thus, the direction of force is along negative Z axis. Option (A) is correct.

Step by Step explanation:

The velocity of electron in in negative X axis direction.

$\overrightarrow{v}=-v\widehat{i}$

The magnetic filed is along negative Y axis

$\overrightarrow{B}=-B\widehat{j}$

Charge of electron q = - e

The magnetic force is given by the

$\overrightarrow{F}=q\left ( \overrightarrow{v}\times \overrightarrow{B} \right )$

By substituting the values,

$\overrightarrow{F}=- e\left ( -v\widehat{i}\times \left ( -B\widehat{j} \right )\right )$

$\overrightarrow{F}=- e\left ( vB\widehat{k}\right )$

Thus, the direction of force is along negative Z axis.

Answer 2

Answer:

Thus, the direction of force is along negative Z axis. Option (A) is correct.

Step by Step explanation:

The velocity of electron in in negative X axis direction.

The magnetic filed is along negative Y axis

Charge of electron q = - e

The magnetic force is given by the

By substituting the values,

Thus, the direction of force is along negative Z axis.Thus, the direction of force is along negative Z axis. Option (A) is correct.

Step by Step explanation:

The velocity of electron in in negative X axis direction.

The magnetic filed is along negative Y axis

Charge of electron q = - e

The magnetic force is given by the

By substituting the values,

Thus, the direction of force is along negative Z axis.Thus, the direction of force is along negative Z axis. Option (A) is correct.

Step by Step explanation:

The velocity of electron in in negative X axis direction.

The magnetic filed is along negative Y axis

Charge of electron q = - e

The magnetic force is given by the

By substituting the values,

Thus, the direction of force is along negative Z axis.

Explanation: