An electron is moving with constant velocity along $x - $ axis. If a uniform electric field is applied along $y - $ axis, then its path in the $x - y$ plane will be
A straight line
A circle
A parabola
An ellipse
What is specific charge ? Write its standard value.
Cathode rays are
Which particles are responsible for conductivity of metals ?
The specific charge of an electron is
Positive rays consists of