Question

An electron enters a magnetic field at right angles to it, as shown

in Fig. 13.14(given in the science NCERT textbook). The direction of force acting on the electron will be

(a) to the right.

(b) to the left.

(c) out of the page.

(d) into the page.The answer is given in the NCERT Textbook, but I cannot understand it. Can anyone please explain it to me clearly?

Answer 1

Answer:

The correct answer is (d)

Explanation:

According to Fleming's left hand rule, the direction of force is perpendicular to the direction of magnetic field and current. Here, since the direction of current is taken opposite to the direction of motion of electrons, the force is directed into the page.