Energy of electrons can be increased by allowing them
To fall through electric potential
To move in high magnetic field
To fall from great heights
To pass through lead blocks
How mass of an electron can be obtained ?
The cathode rays have particle nature because of the fact that
Cathode rays enter into a uniform magnetic field perpendicular to the direction of the field. In the magnetic field their path will be
What is specific charge ? Write its standard value.
Who produced electromagnetic waves for the first time ?