Question

23. In the given figure. E and B are
magnitudes of electric and
magnetic fields which are acting
on a moving electron as shown.
The direction of velocity of
electron is along X-axis.
Then. force on electron is given by

Answer 1

General Expression of Magnetic and Electrostatic Force on moving charge is:

$\vec{F} = q( \vec{v} \times \vec{B}) + q \vec{E}$

• Now, put the vector values of v and B seeing the diagram.

$\implies \vec{F} = - q( v \hat{i} \times B \hat{k}) + q E \hat{j}$

$\implies \vec{F} = q v B \hat{j}+ q E \hat{j}$

$\implies \vec{F} = q( v B \hat{j}+ E \hat{j})$

$\implies \vec{F} = q( E + v B ) \hat{j}$

So, OPTION IS CORRECT ✔️

Answer 2

Answer:

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