Question

Given below are three diagrams showing entry of an electron in n magnetic field

Answer 1

The correct answer is 1

because electron in n magnetic field always travels in a straight path according to this question

Answer 2

The case in which the force on the electron will be (a) maximum and (b) minimum will be (i) and (iii) respectively.

• An electron when it moves in a magnetic field experience a force on it.

• The magnitude of this force F is given by qVB. Here q. V, and B are the magnitude of the charge, the velocity, and the magnitude of the magnetic field in which the electron is traveling.

• This force is maximum when all q, V, and B are mutually perpendicular to each other.

• In case (i) the electron is traveling perpendicular to the field and in case (iii) it is traveling parallel to the field.

• Hence the force is maximum and minimum on the electron in each case.

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