Electric field and magnetic field in Thomson mass spectrograph are applied
Simultaneously, perpendicular
Perpendicular but not simultaneously
Parallel but not simultaneously
Parallel simultaneously
In $1897$, J.J.Thomson invented which particle ?
From the following, what charges can be present on oil drops in Millikan's experiment
(Here e is the electronic charge)
Cathode rays enter into a uniform magnetic field perpendicular to the direction of the field. In the magnetic field their path will be
A metal plate gets heated, when cathode rays strike against, it due to
The current conduction in a discharged tube is due to