Q133 / 180 · KCET 2012 · Physics

Pick out the wrong statement.

A
An electron at rest experiences no force in the magnetic field
B
The gain in the KE of the electron moving at right angles to the magnetic field is zero
C
When an electron is shot at right angles to the electric field, it traces a parabolic path
Correct answer
D
An electron moving in the direction of the electric field gains KE

Solution

Electron is negatively charged, hence experiences electrostatic force opposite to the direction of electric field. As a result, an electron moving in the direction of electric field loses kinetic energy.

Hence, the correct answer is option: 'D'.

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